If you keep getting repeat candida vaginal infections you most likely have candida in the colon that keeps traveling to your genitalia. My ex girl and I kept passing the candida back n forth between us. Eventually we ended up sick with a full blown candidaisis syndrome. My advice would be to work on health before sex because u can't have sex if your not healthy. If your trying to maintain a relationship while fixing your issue just use condoms. Also too much Sex depletes the adrenal glands which controls candida in the gut to warn u. But in all, there nothing you can do but heal yourself. If your BF is healthy he probably won't pick up the infection. There isn't much to u can do as long as the infection is in overgrowth form.