I feel like the only way to explain my "Situation" Is here on the internet, as I fear my close friends and/or family members may not understand where I'm coming from. I don't want to get "Professional help". I feel like it's too embarrassing for me to say what I'm about to type in person (Please, I have no self-esteem and I'm highly self-conscious).

I grew up (for the most part), in a family who supports me. Yet, I feel like the way they raised me kind, may have contributed to this.. Those reasons, I will not post on here for the sake of privacy.

This is probably going to make me seem like the world's weirdest person to exist...

Odd Thoughts
Ok, where do I even start? Let's just say...I have had very..."Odd" thoughts.. Ever since a young age, I've entertained myself by playing a video game, reading something, watching a video, etc. As a result of this, my mind likes to create these "Alternate universes", where certain characters (Most of them which I make up), are in this world. These "characters", like us humans interact with this world. I've realized that these characters can also be from a certain video game I played.
I have fun with this "Alternate universe" and start creating back-stories for them, choose their careers, and in general their way of living (Usually, they're celebrities). My mind starts thinking this made-up person doing things.. Which usually relates to what happens to me in real life, what I hear on the news, etc.

These sort of thoughts can get..."Too entertaining" I guess, and I may begin to squirm in my chair or even run across the room out of nowhere. Please keep in mind that these thoughts get triggered mostly when I listen to meaningful music and video games!! .-.

Now, I 100% know that the people and the thoughts I get aren't real, but it's like my mind interprets they are or something???
Well, this is one part of this...erm..."Situation". I've had this sort of thing for as long I can remember and I know they are abnormal. I told my mom somethings like this not too long ago and she said she had the same thing and that its "normal"..

Well...Nobody else seems to have this sooo...

Odd Desirings
This is going to be embarrasing.. When I was younger, I used to get made fun of a lot, and I hated a variety of my classmates. If I hated them enough, I had imaginations of me breaking into their house and...Well..."Getting revenge". And when I say "Getting revenge", I mean writing stuff on their body with a permanent marker so that if they went to school the next morning, so they would be humiliated. I even had imaginations of shaving all of their hair off and perhaps some violent actions. Keep in mind that I was 6/7 years old....

Odd Likings
Now, onto the third part. This happened started a few months ago.
Let me just start off by saying I'm probably not depressed. For the most part, I like my life and have had no suicidal thoughts.

All of a sudden, I've had this weird liking for creepy, depressing things. I read some disturbing stories/videos online and listened to depressing songs and I had this strange feeling of...Pleasure? I'm pretty sure it wasn't sexual arousal, but it just felt...Good. However, it simultaneously felt odd at the same time.

Summary
I fear I have some sort of psychopathy, ADHD, anxiety, schizophrenia or something like that. I know that this isn't typical behavior for someone as young as me..

Anyone relate?....I'm quite concerned for my mental health..