Help! Opinions Greatly Appreciated Guys And Gals

My name is Julian and I'm from San Antonio, TX. So I've had a growing curiosity in the paranormal since having some occurrences in my home recently. Was hoping I could share this and possibly get some insight as to what you guys think.

So I've lived at my rental home for the past 2.5 years. First a brief history of my connection with "the other side". When I was 12/13 I lived in a house that was definitely haunted. I would get home from middle school before everyone else. I was home alone for an hour or 2 (Monday-Friday) Long story short, I had this ghost (I assume) that would constantly f with me! I turn the lights off and them FLICK!... The lights were on again. This was pretty much an everyday occurrence. It also went the opposite way as in sometimes I'd turn the lights on and FLICK!... Back off again. Now I don't consider myself a big badass that isn't afraid of anything but I do remember specifically only being annoyed and not scared. Looking back at it I think "why the hell wasn't 12 year old Julian freaked he hell out?". No one else that lived in the house ever experienced anything near what happened to me on a (nearly) everyday basis.

So this is leading to one of my questions, why me? There was a younger kid there for the weekend (step brother) and an older brother who was 17 (and later his girlfriend) along with the mom and dad. Do these spirits only decide to screw with certain people? If so, why?

Wait, I'm sorry I just remembered one single occurrence that was shared just with "all the kids" which freaked my brother's girlfriend out and we actually vacated the house for the night. We were around the dinner table and all heard a gross sounding "slurp" and we all immediately looked at each other like "did you just hear that?" Can't explain the sound much. But it didn't sound earthly I can tell you that... And then we were at out aunts house within a few minutes (we had no animals at all by the wa). They were all freaked out, but once again, I don't recall feeling freaked like them. Does this me more in touch or less in touch because I didn't feel like them? So this is the last occurrences of my adolescence life.

Moving right along to 2 years ago... I moved in to the home I currently reside (I'm 30 now). First occurrence was waking up super cold and my analog thermostat (the old kind where you physically have to move) was SLAMMED to the bottom (50/60 degrees I guess). So I thought that's very weird, googled for about an hour (I consider myself a good googler!) and no earthly explanation.

So about a year passes and it happens again! This time I tell some friends and family. I keep getting told "move out"! My ac moving twice hardly should justify me moving out... So I didn't.

Fast forward a few months... Now I have a girlfriend and she lives here with her daughter. Things in the past few months have greatly increased! Ok, for about 2-3 days straight, we kept getting locked out of the garage (the door that leads to the house) so we would have to call the other person and say "hey open the door that leads to the house, why did you lock it?!". So this continually happened to both of us. We dabbled with the idea that the 3 year old girl was doing it but day 2 and 3 she was with her dad, so she couldn't be the scapegoat anymore. So needless to say, this freaked the hell out of my girlfriend but like I said before... 3 days later, it didn't happen anymore.

Now for about a week straight, I woke up with heart racing at exactly 3am! I would wake up paranoid to the point I was looking out windows with my gun in my hand 2 of those days! I didn't see anything but I just felt like "something's not right". I Remember a couple of these nights I heard this deep "hum" (like a diesel truck). This went away for the most part since. My mom told me to pray when that happens and seemed to do the trick.

One time I woke up and could have sworn a heard a "shhhhhhh" (as in when a mother tries to put her baby back to sleep). It was actually soothing, not at all struck any fear, I simply went back to sleep. I still wake up multiple times but simply fall back asleep a few minutes later.

So skip ahead to last week. I wake up and look for my remote... Aw darn the batteries are out!... Or so I thought... I opened the back of the remote and a freaking battery is missing! I call my mom and she urges me to move out again lol. So I go the whole day with that in the back of my head and at end of the day I finally say "there has to be a battery somewhere around my room". So I rip apart my room and it's under a rug. So now I'm kind of freaked. Who the hell took the remote out of my battery and picked up the rug and slipped it about a foot in? It's flush with the floor. This couldn't have been an accident? Batteries don't fall out of remotes and sweep themselves under carpet right?!

So on to last night... I wake up around 3 ish (like I usually) do and my French doors fling open. So I'm half asleep and thinking, it has to be my girlfriend's daughter. But I don't see her when I get up! Now the 3 year old was here and she know she's not allowed in our room. So it's not unusual that she opens the door but stays at the doorway. So I had a big question mark over this occurrence. Was this indeed Otherworldly or a 3 year old that opened the door in the middle of the night and had a change of heart, got scared she would get in trouble and ran back to her room? I left it at that and wrote it off for the most part.

We questioned the 3 year old and she said "nope"... Then she went along with some rambling (like toddlers do) and a few words caught her mom's and my attention... "I sleep and somebody watching me"! We were kind of freaked out and told her jokingly "you're creepy"! Then we asked her "who's watching"?... She says "probably my grandpa". It wasn't them by the way, they are both alive. But once again, can't take what a 3 year old says to heart. She's also lied to us before.

So tonight is when things took a big leap. I was staring in the hallway (where the little girl sleeps) during the commercial break (to whatever I was watching) and see a shadow walk by. So I tell my girlfriend "your daughter is being creepy in the hallway again, "She gets up and comes back with a pale face and says "she's very much asleep in the same position she's been in".

So this is the game changer here. I've never "seen anything" until today. Should I be concerned? I've been here for 2.5 years, why now? Am I attracting this or is this a chance thing? If this is indeed supernatural, is it likely to progressively "get worse"? Excuse my spelling and grammar. It's 5am and I'm usually asleep a lot earlier. Thanks ahead of time!