Please Help Lmao

So last year I got out of an abusive relationship and I am currently dating a really nice guy who's very sweet, today was 8 months with him. Anyways my sister and friends have been saying they see my ex around and my current boyfriend knows how he treated me and he haaaaates him, I do to but that's beside the point. Anyways he said he wouldn't start a scene or anything if we ever saw my ex in public but 1. I'm terrified of my ex and 2. Idk what would go down. I love going out and doing things tho, you guys have any advice for my situation?