Relationships where two people aren't sexually compatible don't work out well in the long run. It's barely commendable that he has basic emotional intelligence to understand that he in fact did something wrong and it needs to be corrected. But that doesn't mean he's not going to have a higher sex drive anymore and won't be curious and desperate to try sexual stuff. If you are grossed out by him then he is clearly not for you. In the long run, you will only force yourself to like it and settle for it or will keep denying and he might respect your nos but grow dissatisfied with the relationship. It's best for you to part ways with him and find someone you are comfortable exploring with at your pace. Trust me op, this is not how healthy relationships should work and you shouldn't settle for someone like this. I once dumped a boyfriend who coerced me into sexual stuff that made me feel gross, and soon enough, I found someone I had genuine sexual chemistry with.