Am I wrong to be upset?

There was this guy I had a relationship on and off for about 3 years, the last 6 months we were just freinds with benefits because he didnt want to commit to me since he didnt like that I had been diagnosed with depression. That is why he broke up with me for the last time we were official. In the past 6 months he had been increasingly emotionally abusive and I hadnt realized until my psychiatrist & therapist made me face the truth. Once she did I attempted to tell him, that I didnt appreciate the way he talked to me but honestly it made things worse and he began to say I was too sensitive and would just become more abusive. It got to a point where we would be angry with each other every month. And yet I still wanted him, because I was afraid to be without him, and he did whatever he liked to me. Until one day I found out he was flirting with a girl, and he said it was a joke, and I felt hurt because I thought we were a thing but in actuality we still werent because he kept saying "your depression makes me not want a relationship with you" but at times I guess to coerce me into being sexual with him, he'd say things that were conflicting "you'd be perfect but you have depression" and it was so hard to hear. Eventually without any warning, he did cut me off and decided he didnt need me anymore. The last day I ever saw him, I was crying my eyes out because it really did hurt to see him talk so romantically to another girl. He then asked me to suck his d*** and I did because I felt bad that I had caused him stress...and he said "I never would like for you to feel used" and he blocked me and never spoke to me again. I cried uncontrollably and tried my hardest to contact him but it was unhealthy and obviously he blocked me across everything he could. I felt so devastated. And a few months later I hear rumors that he likes my best friend of 8 years, she knows a good chunk of what happened to me and that guy, the abusiveness that he displayed. Months later I hear they are getting really close and then a rumor appears that they kissed and are friends with benefits. I did politely tell my friend that it did make me a bit uncomfortable but she didnt take too kindly to it, I hoped she'd care since she knew me for so long but she didnt. In the end, these rumors ended up being confirmed by multiple friends and I feel betrayed and hurt by her, I am unsure if I have a right to be upset since I am not dating him. I just thought she would've respected my feelings. I just wonder what might be your guys opinion?