You didn’t mention your ages or how long you’d been “hanging out” with the guy you say you were in love with — all of which would be helpful to know. But given what you have told me, it seems like your guy wasn’t that into you while you were hanging out. In fact if he took you to a club and then left you alone for four hours, that alone would be grounds for not seeing him again because he really wasn’t that interested. In fact, that you got drunk on your own while at the club and made out with another guy is your true self telling you that you were so hurt you acted out. Personally, I believe you meant for him to see you kissing another guy to provoke a reaction — any reaction — from your non-responsive boyfriend who wouldn’t give you a commitment.
Now, he’s made it crystal clear that he’s not interested in you at all, and you’re trying to get back — why?? 😕
I know you think he was your best friend, but I’d ask you to reconsider the definition of a best friend because he sure didn’t act like one.
Accept the loss and embrace it as a cue that you don’t have to waste your time with someone who isn’t Mr. Right. It’s time to move on — but this time, move on and date smarter. If a guy doesn’t kiss you — unless you initiate the kiss (which I would NEVER advocate your doing) — take that as a hint he’s not into you. If you’re “hanging out” instead of knowing that you’re on a full fledged date, again, given what I think is your age (I’m guessing you’re in your 20s or 30s), accept that he’s not Mr. Right and keep looking elsewhere.
I’m sorry you’re heart broken, but I think you’d do best to focus your energy on a man who will be a GREAT boyfriend — not someone so riddled with doubt about you.