Phobia of cum?

Minnie • 19/England🌟
It freaks me out!! If it comes near me I literally gag and it makes my boyfriend feel awkward because if it goes on the bed sheets I can't stop squealing. It makes my skin crawl and I have literally vomited before because a little bit went on my leg.
What should I do? 
I feel bad for my boyfriend because it can't make him feel good but I just hate cum so much!!