Just found out my bf is a member of an adult website..what to do?

Somehow I managed to get his username and password, found out that he opened an account like a month ago. It says that he's interested in threesomes, flirting, fwb but the strange thing is that he doesn't have any pics, messages and only 1 friend. It looks like he is not active at all. I know he likes porn, we are not having sex right now because he wants to wait until we are married. Maybe he's sexually frustrated but I'm just so upset and don't know what to