i’m stuck and tired

my boyfriend and i have been together for a little over 10 months and it’s never been better. we were best friends before we started dating and i’m so happy with the relationship. however, there is one issue. his ex girlfriend. a few months before we started dating he was in a MONTH long relationship with a girl who forced him to cut me off. their relationship was toxic but that’s it’s own story. during our entire friendship he had stopped talking to me for that month but she now makes it seem like i’m the reason they broke up. she claims that i wrecked their relationship but i wasn’t even in contact with him (except for once or twice and even then he would talk about how much he likes her). during their relationship i always said that if he’s happy then i’m happy for him and as it should be. fast forward and they’ve now broken up and we slowly became friends again and a little over a month later we begin dating. ik it’s not a long difference in between but we spent that month reconnecting and his doesn’t care for his ex at all. it’s been almost 11 months of our relationship but she still talks crap about me and posts things about me and him. she comments about how much she misses him. about 3 months into our relationship she did text me apologizing for everything but less than a month later asked him to cheat on me with her so talking to her is out of the picture. she’s much younger than we are (we’re about 2-3 years older than her) and st completely different points in our lives. i don’t want to speak with her and he has her blocked on everything but she still continues to hate me for things i haven’t done. i just want to leave her in the past but she won’t get over my bf.