What if I’m the problem ?

What if I’m the problem when I’m around people ? I think about this all the time. I feel a-lot has change towards others and myself. I feel like I used to let people walk on me all the time and never say anything when they would tell me something. I feel like now that I treat people the same way I’m suddenly the “bad guy” or “you have such an attitude” or I’m always arguing with someone. I feel like now it’s not the same energy with others like it used to be. I feel now that people have treated me a certain way or told me stuff it gets stuck in my head. And I think about it why be a tooth face or have double standards with someone you know. I feel bad at times because of the way I act at times but I feel like I don’t forget what people have said to me and I started treating them like they used to treat me.

But idk sometimes I feel I’m the problem