I’m grossed out by my boyfriend

So I’ve been with my boyfriend 2 and a half years. Since the beginning, his cum has been absolutely awful. His precum is just as bad and he precums a lot so it has gotten to where I want nothing to do with his penis. At all. At the beginning I could tolerate but it has gotten to where I can’t even go near his dick without gagging...I don’t even want to touch his dick because of it. His cum is literally like bleach it is AWFUL. I’ve talked to him about this and we have tried changing his diet and eliminating certain foods but there has never been a change.

I know he feels shit about it and I feel really bad about it but I cannot bring myself to go near his dick, I want to throw up every single time. I gag whenever I get a slight smell of it.

We both have been tested multiple time throughout the relationship so it’s not an sti or anything.

I don’t know what to do. I feel like shit. I hardly have any interest in having sex with my boyfriend.