Confused.. Really confused.

I have been with my boyfriend for over a year and recently he has been kind of a jerk. Last night we were camping with friends and everyone got drunk except me, I am kind of the big sister figure in the friend group - aka I keep everyone alive. I don't enjoy drinking so I stayed sober. The whole time he was hardcore flirting with another girl who was hanging out with us and she is new to the group, which is cool she is really nice! Everyone is leaving again for college soon, so we all went camping.

I confronted him about it and I could tell he felt bad but he blamed it on him being drunk. Which doesn't help me feel any better. I struggle a lot because I can connect and empathize with him but he can not return the unique connection.

Now tonight, my best guy friend for the past six years spills the beans that he has had feelings for me since we met. I thought he had no feelings so I stuffed my feelings for him in a bag when I met my current boyfriend. I literally started crying when he told me he had hardcore feelings for me because he is leaving to join the Air Force and I won't be able to see him for a while.

I am so confused and upset and I don't know how to deal with these overwhelming emotions. Advice?