u/2wavyli

I am currently dating my homeboys cousin. I’ve been friends with both of them since middle school & my homeboy & I have only ever just been friends, but he has always expressed that he likes me and has always had a thing for me. About 3 years ago when I was single and vulnerable I used my homeboy strictly for sex. We’ve only had sex a handful of times since then and I always told him I do not like him like that. Recently I started talking to his cousin & before I even went through with it I asked him if he was okay with it & he said “I don’t care I mean you always said we’d never be anything.” Which is true. I asked him to please not tell his cousin anything about us & what we’ve done & he said okay. I’m just worried now that if his cousin & I get serious will he try to sabotage it & how should I move forward with this. Should I end up telling him what happened between us or do I not. Please advise!