leave or work it out..

I've been with my boyfriend for 3yrs... on and off. and I'm not sure if I wanna be with him honestly... I love him with everything in me but I'm not sure if I'm all there. and I recently started to feel this way. being ina relationship with him was hard especially when you're on and off and he doesn't let go of the past. he dwells on everything.. and he likes the play victim. I really need advice about this... ********UPDATE********UPDATE******* me and him ended things today.. we just both mutually agreed that we're dragging things along.. and that we're better off as strangers.. I feel relieved!im glad he was feeling it too cause I really didn't wanna hurt him and I honestly think that I wasn't going to leave him just so I wouldn't hurt him..