Full story: 

You were with this amazing guy for two years and he started treating you like crap! Then you meet this amazingly nice guy that you've had a thing for in the past but never spoke.. Yous meet up and want to date because it feels right.... So you leave the boyfriend of 2 years and date this guy at the start everything's perfect. Then you find out he has an ex not of 3 years or 5 years even but of SEVEN YEARS! He says his over her etc so you don't care... But then she starts making fake Facebook accounts of you and trying to stir your relationship for about 6 months into the relationship! It's hard for the both of you because sometime you accidentally say your ex's name and he says his ex's name sometimes... Anyways one day it gets too much and yous have an argument about the accounts being made... And he leaves and goes to his sisters place he stops texting/calling you after a couple hours and your at your friends place, you go down to see him at his sisters to ask him what's going on... When you get there his ex and his sister are out the front (they're bestfriends) so you leave and you try calling him furiously it makes you sick to your stomach that you break out in tears!! So you leave he doesn't message you until the next day then he comes home and says he fell asleep that's why he didn't reply! A few days later the ex inboxes you saying he was on the ground crying saying he wishes she was you.. He said this was a lie but has made comments before like "you try be with someone for 7 years" etc! 

It happened about 4 months ago now but I'm still very heart broken... Every time I think about this. Should I leave him? Advice someone please.. 

We live together.