Does this sound like a mental disorder or my personality

To start off, I’m an only child with an abusive biological father, so I thought I could handle loneliness well. I found out that loneliness impacted me more than anything else when my best friend of over five years became a total bitch, I spent six weeks confined to my room, each day getting lonelier. Ever since that experience I crave attention. Not like “oh hey talk to me”, like I need attention every hour of the day otherwise I feel neglected. I have no close friends that I feel I can share this with, my mum doesn’t understand and my stepdad is a dick. I feel like I’m always competing to talk to someone in a three-way conversation, and if they don’t focus on me it’s because they hate me. My ex best friend and I were so close all day everyday we were next to each other chatting, now I don’t have that to share with anybody. On top of that I started at a new school (which hasn’t gone well) where she goes and she doesn’t understand why I hate her. Ever since she hurt me I completely deserted her, I haven’t said a word to her (even when she starts to make conversation with me) because I am just that hurt and she will never understand. I see multiple professionals and I have been diagnosed with general and social anxiety disorder. Any input would be helpful.