See I can empathize with you..But life is to move on..Now since you are saying that she left you for else..Then rather taking it in negative way..Take it positive that it occur early only..See you need to understand that someone who loves you equally or more than you love that person is good...Also time is a great healer..focus on your hobbies..talk to your friends which you were not able to do earlier..ok... follow sleep hygiene measures from Google.. Consult a Psychiatrist for detailed evaluation and Management of the case