Every time me and my boyfriend kiss a lot i get sick (headache, stuffiness, sore throat). i am absolutely positive he isn't cheating. it only happens when we kiss a lot (a lot of saliva sharing). he isn't sick and doesn't get sick from it. plz help?

Dr. can check both: Throat pain can be from a strep throat infection (antibiotics are needed), a cold or influenza, or from some other cause such as allergies or irritants. Usually, one sees her doctor if the sore throat is bothersome, recurrent, or doesn't go away quickly (mainly to check for strep throat). Some people are strep "carriers" and don't get sick, but they can transmit strep germs to other people.

Possibilities: I would wonder if he is consuming a product you are allergic to, where saliva transfer exposes you to that material. Sometimes strep carriers will not get ill from it but can pass it on. Sounds like you need to do some detective work. I can't see how he would gain this from someone else & only you are bothered.