Hi, underthestars, welcome to PsychCentral (PC). I did a little bit of the same thing when I was 14 or so, I lived in California and blew up a guy I saw at the beach into a boyfriend/he taught me to surf deal (never been on a surfboard in my life :-) I had an emotionally abusive stepmother, sounds like similar deal to your mother. I only ditched that story 15-20 years ago (I'm 56-1/2 :-) I suppose when I didn't "need" it anymore.

I don't think you have a mental illness problem, you have an abusive mother problem. I would try to get "out into the world" a bit if I were you. It was very hard for me, having not seen or done anything to figure out my own life and what I wanted to do and get more than imaginary experiences under my belt. I was in therapy because I couldn't shake my stepmother's heavy influence until after she died (2001!) and all the crummy ways she and I had of relating. If the only experiences you get are those around your parents, doesn't sound like yours will be very broad either :-)

You're 19 now? Do you go to school, have a job, ??? I would work on a plan to start your own life in some way, make friends at work, etc. away from your parents' 100% influence. I still walk too fast because my stepmother and one of my older brothers did (and my mother was always yelling at me, "Keep up!" so over the years my friends have had to influence me to slow down) and there's tons of other "little" stuff that one doesn't even see that is influencing one when you stay a long time in "one place." That's only a good idea if it's a good place?