Should I leave him for good?

i say, find out more about 'this guy'. see if he's really going to treat you with respect and not cheat on you. also, find out if he has feelings for you too. if he does, then go with him. being with your boyfriend only brings bad memories which will cause you to constantly wonder if he'll repeat the same mistakes, therefore, a relationship with no trust, is no relationship. go with the other guy :)