Relationship troubles (21F)(25F)

I (21F) am in a LDR online relationship. We met through a community on a different platform. Lately I’ve been withdrawn from the relationship though because of some issues. The biggest one is that they’ve accused me several times now of being an account of my ex who harassed them. My ex by all means was not a good person. He cheated on me with mutual friends, caused problems with my current partner and their ex, and was harassing them. But I’ve given proof that I’m not. I know my partner is still hurting from it. But it hurts to be accused like that. I’ve tried to stay present in the relationship but it’s caused me to be withdrawn and frankly I don’t want to even continue the relationship. I’m constantly wondering when I’ll be accused or when my ex will be brought up in conversation again. I don’t know what to do. Don’t get me wrong, I love my partner. My partner is a good person and I don’t want to upset them. But being accused of being someone who hurt you and other people has just really strained everything.