i'd move on to someone who has better health habits. there must be something that's causing you to get a sore throat if it's happening the next day after kissing him. maybe his dental hygene is poor as well as his health habits. doesn't seem worth it unless he comes around and takes better care. but he has to make that choice on his own.
everytime i make out with this guy i get a sore throat the next day. this guy smokes and doesn't eat healthy. he is sort of a fling and so occasionally we'll get together. we make out a lot so could there be something tranferred when we kiss that makes me have a sore throat the next day?