Teresa,
A long time ago I had a similar phobia. Bad breath is caused by bacteria. My advice to you, is to brush your teeth after each meal and carry around a pack of mints. This way, it should never be an issue. In the long run, nobody does care. For initial attraction, in the totally superficial sense, I'd just treat your mouth like any other part of your body. Would you expect a guy to ask you out if you didn't shower? Good hygiene is respected and healthy. All in all, you need to keep your chin up. Confidence is the biggest attraction.
M