Search Results: how do i get my ex to leave his girlfriend

I've dated 8 guys and had 3 serious relationships. I've only dumped one guy out of 2. Since i felt devastated, heartbroken and depressed after a heartbreak, i never knew if guys felt the same. My 2 exes laughed and were cruel to me when they were dumping me. But my last ex i broke up with him because i couldn't take his distant and crazy emotions, i think he might have Bi-polar. He always told me that he loved being with me and I was his girl. But he was never there emotionally. After not hearing from for a week i decided to check on him and he blew up at me "calling me a nagging bitch, he didn't want anything from me, to leave him alone and he would have never got involved with me" i had enough after 10 months and broke up with him saying "fuck you, you little bitch! I'm so done with your bullshit! you cunt!" FYI i never talked to him that way. He sent me one last message saying "I'm sorry and I hope you find someone who appreciate you like you did with me. I'm not mad just upset because I didn't show you that I cared about you. Okay bye" 2 weeks later he wanted to get back with me and he told me that he got drunk 3 days straight after i ended it and he couldn't delete my pictures because he felt happy just looking at me and remembered the good times. For a month i was willing to try again but he was being distant again so on my birthday he admitted he didn't want to get back together and "just said that to be nice". I told him "Thank you for saying happy birthday, thank you for being a asshole and tricking me for 10 months. Fuck off and don't message me and leave me alone." I figured my ex wasn't sincerely heartbroken like i was and he toyed with me.
So if you had a girlfriend and was genuinely in love with her and your relationship ended, how do you feel? I'm starting to think maybe guys don't grieve the same way girls do. But i don't want to think that.

About a year ago i reconnected with a friend from school. We'd stay up til 3/4 just talking. Midnight drives. And obviously we got close as we have a lot in common. Well the problem was he had a girlfriend. And one of the drives we admitted we had feelings. He'd come to me with his problems in his relationship as she isn't the type to deal with emotions, angry a lot and abusive, his grandad recently passed so he needed someone to talk to. Things escalated (just once) and we felt bad so he told his girlfriend and we stopped talking. well a year on i met a new guy, been together about 4 months. And we are happy when we're together. Its just his family. They make snide comments which irk me and then we argue. Or my dad makes comments about him not driving, or when he was unemployed causing more arguements. Recently the ex came back in the picture to talk which has pissed my boyfriend off even though he won't admit it. With all the arguments i have been happier talking to my ex as he was there through a lot of my family problems. I can't talk to my boyfriend about them as he brushes them off or about my depression as his mothers convinced him without my tablets ill go psycho. Well its gotten to the point that my boyfriend will pick arguments to wind me up as 'he finds it hilarious' then make passive aggressive comments about my ex. My ex has been nothing but nice to me and has made it clear if i wanted to make a go of things then he would. I feel guilty about thinking about it but im not sure what to do? As he's still got his girlfriend he says he'll leave but he's said it all before.