It's no wonder she left with the first reply's she got. Through out my who life (and I'm sure it's the same with yours too) Ive had to make difficult decisions. Ones regarding relationships are tricky, cause your dealing with emotions, and no matter what you do you can't change another person's mind. My advice to you is to find a hobby, something you enjoy doing. When me and my ex of 3 years broke up (it's a really long story so I'm not going to go through it) I would write poetry. It helped me let out my feelings in ways that I could not with other people. Lets face it your friends only want to listen to a problem you have a few times and then they get frustrated (at least mine were that way). I would also read, a way for me to forget about how bad I thought my life was. I'm about to be a mom, which in way way scares me to death cause I know what type of a responsibility that is. At the same time I'm so happy that I think I might burst. Life is full of hardships and believe me you'll never regret your past as long as you learn from it. I would leave this guy alone, being friends with him is going to hurt you and it's not healthy. I hope this helps, If you ever need anything I'm usually on once a week so PM me.