I don’t understand 🤦🏽‍♀️??!!

I been dating this boy for two months. Here’s the plot twist he was dating this girl for the last 3 year the broke up over the summer before the school year. The girl he use to be dating was someone in my friend group but when she found out she was really mad because it was her ex and it was wrong for me to like him(it was wrong because I shouldn’t never did that and I blame myself). This girl who gotten mad at me i never considered her as a friend she was very rude and often mean.

We was cool in 6 grade into everyone in that friend group got into this argument and it show everyone true colors and how they really felt about you. Sooner in 7 grade I did a lot of wrong stuff that (I’m going to women up and said I did but I learn a valuable lesson from this). I send a lot of nudes, I did a lot of stuff with a lot of boys and I was very wrong for making myself look that bad, I did all this stuff because I was planning to end my life anyway.

I was self harming and was going through depression while doing all of this, I finally told and I was put in the hospital for a few days for impatient and then I when to therapy(while going to school). While all this was happening I only had one real friend to tell me I’m making my self look very bad while doing all this I need to stop and that I have to talk to her and tell her what’s going on for her to help me I took her words into heart and I stop acting like a thot and doing slut stuff it wasn’t like my personality anyway I was just trying to be accept by the boys and I learn u can’t try to always please others ESPECIALLY BOYS. It all backfired i was soon bully and made fun of by that same ppl I was doing and quote “making happy” was calling me all these names. Okay back to the point I’m sorry if u had to read all this.

While all this was happening my (the girl who was dating the boy for three years) she and her other friend would call my real friend ugly and stuff and say that the boy she was dating( which was the 3 year ex bsf ex bf) would leave her and that he never like her they call her the b-word and all the other shit(they were toxic and fake talk about me and her and I lose all my trust in her). Oh and my real friend wasn’t friends with this girl she was new to the school so she didn’t know them or that that was her ex and stuff.

My point is I don’t know if I should blame myself for dating this boy because he was this girl ex who I known for a while( don’t consider a friend). I feel the happiest I ever felt in a relationship and he the first guy to treat me right and love me for me.

Once in a while she text ppl I know and call me stuff like slut or they won’t last stuff like that just talking she do goes to a different school and stuff but always talk about me and stuff. I do feel bad because I’m blaming myself and b I feel in the wrong but I really love this boy and I knew him since 1 grade and up so we are good friends before we started liking eachother. How should I feel? I’m I in the wrong? Should I blame myself? Can I get some feedback pls?