Relationship problem

Maya
My boyfriend and I are 15 (myself) and 17 (him). We've been together for 9 months today, and we live together due to financial problems on his part (his family is homeless). We have a very relaxed relationship and we both have our own friends and personal space, and two weeks ago I found out that he cheated on me while intoxicated with a female he was friends with. She's afraid to come to school now, but he and I talked things out because I don't believe in fighting or anything like that. He cheated around 3 months ago and it's VERY not like him to do that, he treats me and everyone he crosses paths with, with utmost respect. But recently I've been overthinking what HAPPEEND and telling myself he doesn't love me when I know all too well he does. We both are battling severe depression and I have anorexia and the situation is really setting me off In terms of those two factors, but I don't know how to calm my sled down about it. I love him, and k have no intentions of ending the relationship. Does anyone have any advice or input on this?