How do you get your ex boyfriend back when he hates you and have a girlfriend?

ILL try it this other person will prop.say and prop.do anything too keep you out of his site and mind so whatch your self alot depends on how you two broke up tallin him the truth and letting know how you fell is the best way honesty can be your best policy would need more info on this good luck whatch your back around thee other girlthey can be diseatfull.