Is this going to mess things up between us?

my boyfriend is joinging a fraternity this fall, he has already gotten a bid, im just afraid this is going to ruin things between us. im obviously not going to tell him not to be in a frat bc that is his choice, i dont control his life. but is this going to ruin things for us? what kind of things do frats make the pledges do? drugs? do they make them try to hook up with girls?