Is it normal i have a pretend conversation...

I always talk to myself and sometimes i pretend im arguing with someone. Its mostly things that bug me especially people who bug me and get under my skin.

Id pretend i'm exposing them and getting back to them and in my head id already know what they're about to say and act out scenarios. Its always me yelling back at them getting them back and letting out all my anger. Thats my coping mecchanism ive done or noticed. Also i talk to myself everyday when im alone. I normally do it for like 45min sometimes to a hour and even less and more. I just feel better talking by myself. I talk about how im lonely and my feelinga and how i feel then afterwards im ok. I dont know if im going crazy or im already crazy but i do this a lot. i dont talk like ''how are you im good type response. I speak out loud. dont refer to myself as anything. I kind of laugh and my evil side of me comes out. Its like i have two versions of me. The me i ''play'' everyday listens to everyones problems and is positive but the dark side of me doesnt care about nobody and is straight up and isnt fearful and isnt afraid to speak up. Sometimes it clashes because when i say something mean my other side will say ''dont say that'' or ''dont do that thats mean'' then i whatever version i am ends up feeling bad then i end up not doing the bad thing i was going to say or do. Its weird. its like a angel and devil scenario. Id think about something mean and say it and laugh and then one side will actually make me feel guilty. I am antisocial girl who keeps herself busy but loves being alone but my other side can be funny,cute and charming but in reality thats not even who I am.....i feel like im acting all the time... Ive had a messed up childhood.....