How do I tell him?!

How do I tell my bf he gave me genital herpes? He doesn't know he has them and I know I got them from him because I've only slept with one other guy besides him and he's slept with many girls 10 plus. The girl he slept with before he met me gave him chlamydia which he gave me when we first started dating, we got that taken care of but I'm I just found out I have herpes... I myself don't even know what to do with myself! I'm so depressed and just can't believe it, like I've only been with 2 guys and there's been girls who have been with many more than me and don't get them. Like why me? What did I do so wrong to deserve something like this!