What should i do? (relationship question)?

Okay, I've been in this relationship for 5 years since I was 16. We both have done wrongs in our past. He's cheated before (all the way) , and I've cheated before (just talking). The first 2 years was AMAZING, & I knew it was love (goosebumps, butterflys, romantic things) but these last 3 have been just straight agruing & nothing romantic at all! I think the majority of our problems are because of his mother, she's a negative smartass woman. & we are living with her. I've asked him a couple of times, "when are we gonna get our own place" but I don't think he's wanting to move away from her. & I really think that's where we have most of arguing about. It feels like I'm not only dating him, but his mother as well..because as soon as something goes wrong in our relationship, we all 3 talk it out, & I feel like it should only be me n him. I appreciate everything his mother has done for me don't get me wrong, but I just can't put up with the additudes..& its only got worse. Right now, I'm confused..should I stay or should I go? I'm not happy & I'm sure he isn't as well, but I guess the reason we keep hanging on is because we are wanting eachother the way it was in the past...I just don't know what to do, its like he gets off work..comes home for an hour or 2 then goes straight to his friends house. He asks me to come over there SOMETIMES but I don't want to go hang out with HIS friends, I just want to do something with HIM..it just don't never happen like that. Please, someone give me some advise