You'll be able to talk to him about it when the time is right. Whenever there is a power imbalance, e.g., age difference, position of trust, percieved love, etc., it is not a loving relationship, it is abuse.
Television has portrayed most young men/boys who have sex with an older woman as being lucky. Women who take advantage of young boys/students are not given the same treatment as men doing the same thing. I was taken advantage of by an older boy when I was 11 to 13 y.o. Was it loving, no. Did I think that he loved me, yes. Did it confuse me and make me think that there was something damaged with me for years, yes. Did it make me gay, no.
I've talked quite a bit with my partner about what happened to me. There are a lot of things that he'll never really understand. We had different childhoods, different experiences, different lives. But the relationship that I have with him is loving, caring and real.
Take good care of yourself,
I want to stay as close to the edge as I can without going over. Out on the edge you see all kinds of things you can't see from the center.
Kurt Vonnegut (1922-2007)