i agree with AnaBola, but i hope it wont get as far as needing to tell his parents.
You shouldnt ask him straight out if he is gay because if its not true, he may fel offended, and if its true, you may destroy your relationship together.
both of my parents have high blood pressure, and my uncle died from a stroke three yrs ago, so i know exactly how you feel. Just remember that god is with you no matter what.
Seeb kooloo le rabbinna
No matter what kind of sickness you have, you dont ever have to think once about taking communion.
Think about, wit all of the different people using the same spoon, not once did anyone ever get sick from the holy body and blood of jesus christ.