My problem is twofold. This has never happened to me before. I like her a lot and am willing to put up with her body, or lack of it, but my real problem is with this newly acquired condom aversion. Practice on your own with condoms or ask her to put it on you when you're having sex, maybe even with her mouth. Losing an erection when everything stops while you concentrate on finding, opening, rolling, pinching, etc. is a common occurrence.
Most men get over it.
Remember, it may not be your ideal as a body part, but it's on the woman you've chosen to care for. I live alone and I have two girls, ages 7 and 8, who live with their dad. I've always been very independent and I try to take care of my financial stuff without asking for help. The problem is that he is very insecure and shows it by telling me things instead of asking me. He also wants me to be only with him, but I have my girls and friends who also want to spend time with me.