Okay... so I've been dating this girl to close to 2 years now. And pretty much the whole time she would talk, hang out with,smoke pot with, sometimes even caught her sleeping over her EX boyfriends house. The background between them goes like this... they've been seeing each other for 5 years and her brother passed away , so the ex was friends with her brother. so they have some deep history together. Which I understood at first. I've gotten into fights with her plenty of times regarding this situation of her still hanging out with him. She claims they are just friends and there is absolutely nothing else going on between them. She says all the time that I'm the only one for her and how much she loves me and wants to be with me. And in some ways I truly do believe her. But I seriously can't take the shadiness that goes on between them. I call her and she doesn't pick up I assume shes with him... and the percentage of the time I'm correct. The other day she tells me " hey don't be mad but I'm going to just smoke and chill with him for a bit" and I just hung up on her, because I got so heated. She ended up not going... but then the other night I found her car not at home and over his house... it was there till the late morning. She does lend her car out to him sometimes when he needs it. But i felt like she slept over. How am I suppose to trust a girl like this? I love her to death but I can't deal with this situation anymore! Any advice?