PLEASE help i cant get over my ex im dyinn?

we were together 2 half yrs. i cheated the first month i told him and for the next 2 yrs he thought it was okay when we argue to cheat n talk to girls. he treated me bad most of the yrs anyways but i took it cause i cheated in the beginning. we broke up 2 months ago cause he talked to a girl again. i stalk his fb he talks to so many girls. i cant get over him i feel like im dying im so sick.please help will i ever stop missing and loving him?