Ashamed to be naked in front of my boyfriend

So this isn't going to be one of those posts complaining about minor insecurities that I'm afraid of my boyfriend seeing, I have a major issue that doesn't respond to any treatments and that's pretty severe acne on my face, chest, shoulders, butt, and legs. I can't wear tank tops, I can't go to the beach, but most of all I can't get naked with my boyfriend unless I'm fully covered in Sally Hansen body makeup that only does a mediocre job of covering my acne. I'm 17, and atypically for his age he's actually wonderful and says that he doesn't care and that my skin is fine, but he's never seen any of it without makeup. I keep crying all the time because I feel so disgusting and I'm so ashamed that my skin is the way it is. I take such good care of it, and I control every other aspect of my physical appearance to compensate (clothing, weight, hair, makeup). I've spent hundreds of dollars on topical and oral medications/antibiotics and I don't know what else to do anymore. Any tips?