Best friend sex and accident

My best friend and I have been hooking up this year and it's new territory for us but we mostly do the hooking up while we are drunk. We drank this weekend and hooked up again but this time he told me he loves me. Since I was drinking almost the whole night is a black out. When I came back another was on top of me. I don't remember even trying anything with this guy. He just got on me. I think my best friend knows and now he won't talk to me. I feel horrible about it but I did not consent to that other guy.