Unfortunately, breakups are part of relationships, so you're in the right place. Really sorry to hear you're dealing with this, but the good news is this is rock bottom...there's nowhere to go but up from here. Things will improve, trust me, but time is both your enemy & your friend here. Grieving is a process, whether we lost a parent, a GF or a job. We've all been there, brother, & it's never easy when you're feelings were so strongly invested. The reason you're in so much pain is because you cared so much. Your reaction to this pain just means you're alive.
I agree with Loki that the only thing you need to do right now is focus on yourself. If you want to get piss drunk for a few days, go for it. If you wanna eat pizza for a week straight, while playing video games, do it. Try to take things one day at a time. Once you're able to get back on your feet, then the best thing you can do is try to use this time for healing & a little work on yourself. Hit the gym harder, catch up with your buddies, plan a golf trip with them, etc. Drinking is a temporary fix, so try not to fall too deep into that hole. Alcohol is a depressant, so in the long run, it's not the answer to this problem.
What you DO not want to do is call her, text her, email her...break off all contact. It's good you deleted all her contact info in your phone. Drunk dialing or begging for her back will only send you right back to the bottom, but if the urge feels too strong, arrange with a few of your buddies that you can call them instead of calling her. I've had friends there for me at any time, day or night, & I've done the same for them. They will talk you through it & you'll be ok.
More good news, you will be ok. It will take a few weeks or a few months, but you'll be ok. Then you'll realize being single isn't so bad. Take your time, see what's out there. Variety is the spice of life, but no need to rush into a rebound relationship, they usually don't lead anywhere good. You won't replace her right away, but who cares...you don't have to. Enjoy being a bachelor for a bit...there's no need to stop enjoying life because you had your heartbroken.