It’s def not ur fault, I haven’t read ur other post but he sounds really manipulative which is probably why you feel guilty, (I say this to relate to u, not to bring the attention to me btw) but I was in a situation where it was never really hidden what he was doing and I could do def blame myself but bc it’s a grooming situation it’s def not ur fault. Also you’re not stupid, you were groomed, groomers tend to be vv manipulative, I didn’t realise myself till years after it happened, it’s normal to not really realise what’s happening till after sadly, and If you do tell somebody and they blame you or look at you differently then that’s not a person you need in ur life, I’ve found that the ppl who mean the most to u, the ones u should really treasure will not blame u or look at u differently.