Not really sure what to do...

This year I got into a really big fight with who I though was my best friend we made up but I’m not sure I want to be friends with her she’s says the reason we fought was because I changed but it was our freshmen year and I wasn’t doing anything wrong I didn’t drink or smoke I made some new friends but that’s about it she still blames me for it and I don’t know if I want to be friends with her I don’t know what to do because I don’t really have anybody else I’m not a very social person and she’s the only person that really knows me I’m just lost I don’t really have any friends right now and my boyfriend decided to stop texting me and won’t talk to me I don’t know what to do and I don’t know what I did