girlfriend doesn't want to use a condom?

You have to show some good sense, and if it costs you a girlfriend, so be it. Sit her down, look at her, and say you need to talk for a minute about sexual hygiene. Say you have two concerns having unprotected sex, and you want to resolve it with her. Hopefully you have her attention, then say #1, you are not always fresh and inviting in your vagina. #2, I am concerned about what it might be, for you, and for me. If she refuses to address it, get up and leave. If she shows concern, be absolutely up front, and suggest she find out what causes the uninviting odor, perhaps getting a check up at Planned Parenthood, which is free, in most cases. Be sure to look up the location and phone number of a PP Clinic in your town, and be prepared to call them for an appointment. If she's not interested, say good bye, and mean it.

Dude if I even thought someone I dated had an std I'd break up with them. You h should be comfortable enough to ask her to get tested because that's soo gross like to the max

She should have a shower at least once a day :)

Ask her to use protection