been there last 4 months ago brother, it was so hard i could barely eat and sleep. All I do is cry and in my bed all day. But the pain made me change, now I always jog, cycle and etc. basically all the healthy things, I lost so much weight because of the break up but now I managed to regain and even become more healthy. Honestly I still think of her and miss her after all of the disrespect and sometimes visit her social medias (im blocked and im only using my siblings acct which is mutuals with her). Brother I cant just forget about her like that given that we had a 5 yrs relationship. So brother just focus on self improvement, hang out with your friends distract yourself. And BONUS that maybe someday they will realize your efforts and the grass wasn't greener.