What should i do???????????????

Wow... you got a case the love jones bad. I applaud you for opening yourself up to loving deeply even though it didn't work out. The prescription is definitely to get over it. How do you do that? You immerse yourself in things you enjoy: hobbies, sports, friends, new cute girls, just get out there. The pain will subside once you stop lamenting on your lost love. Plus keeping busy doing what you enjoy will expose you meeting new girls your already share an interest with. Mind over heart in this matter, even though your heart tells you stay. Enact the mental override and move on.