Aw man that sucks, I assume it's the one from your other thread. Saying one knows how one feels is kinda pointless with situations like these so I won't even try. I have been in your situation before though. At least, I've broken up with a girl and been in utter misery. You know what helps? Time. It sucks, but it's the truth, give it a month, two months, three months and it won't be gone, but it sure as heck won't be nearly as intense.
I would also totally advise against the whole total hedonism thing. Doesn't help a thing. So man, here are some things that thinking back to my experience might help a little. First, it helps to cry. Sure doesn't feel like it at the moment, cuz u get done with crying and all you feel like doing is crying some more, but your emotions are legitimately screwed up at this point and need to undo all the knots they've worked themselves into. Also, try not to ideal the memory of the relationship. This works for either end of the spectrum. She wasn't the only one for you and you'll never have another shot at true true love again and she wasn't the winged spawn of satan either. Your relationship wasn't paradise and neither was it purgatory, and believe me I've been in a relationship that totally hit the self-destruct key and blew up in my face and WAS purgatory for a few months, but the relationship itself sans crisis i know was great or I wouldn't have been a part of it for so long. Also, it's not totally your fault nor hers, I promise. There is a compromise somewhere in there. Also, this isn't just cuz ur an ENFP, it's cuz yer human, but you are an attractive, well-rounded, deep complex type of guy with loads of appeal, and you will be able to find someone else when you're ready again. I urge you not to try again before you're ready. Nothing makes a person wanna facepalm themselves ten months later like a rebound relationship. I mean even if everything went right and u ended up marrying the girl, would she really want her love story to read, once apon a time I met this prince who was pining over his exgirlfriend...
Other than that, it takes time. I'll try to remember other stuff, but despite all evidence to the contrary, you will be ok, and amazingly enough in a couple years you will be able to speak her name again without collapsing into a love seizure. In the mean time, just try not to do things you'll regret later. Your feelings are totally legitimate, so there's no reason to prove that by leaping off a bridge or into the arms of a hairy black woman or something. Feel free to do things that make you feel like you are having a crisis because you are having a major life crisis and no one can blame you for driving all night in no particular direction for no perceivable reason. It just not good to take a road trip to timbuktu in the middle of the school semester. Also, this is a great time to lean on whatever relationships you put most stock into besides hers. If they are really your friend, they will be there for you, and that makes all the difference and brings the two of you closer. Like two birds with one stone.
Oh yeah, and its ok to like find like your girlfriend and your "song" on youtube and sing it over and over each time getting more incoherent because you're crying too much to enunciate. Punching walls is also ok, and you never know when you're gonna hit that soft spot and make a hole to totally take pictures of and show off to your friends. Boast your strength and sensitivity at the same time while simultaneously making a ploy for their sympathy! Hope you start feeling better soon.