Cheating Boyfriend

I have found out that my long term boyfriend of 4 years has been cheating on me. I have seen clues and other stuff and have caught another women in his house and seen his car at the women house. I confronted him about it but got aggressive and angry started throwing accusations at me. But I have all evidence of him cheating. After the big argument he wanted us to work things out I said okay, but yet still he aint changed. The love that I had foe him at the very first beginning of our realtionship is no more there , his bought me a car which is still at his house which needs tweeking , I want to end things with him but want to collect the car first as he has gained a lot from me so I want to take from him. In terms of me knowing about him cheating and accusing me of certain things i just don't know what to do. I just don't love him anymore but with him to see if things will work but I think his just with me cause I have a good heart and the benefits that he gets from me. What shall I do guys????