My mom bought me a car last year, an older but reliable car, and I used it all the time but little by little I let my SO borrow it, my mom was fine with it as long as he fixed every problem the car got cause he was borrowing it a lot. Now I don't drive the car at all, last time I drove it was maybe 4 months ago. A lot of things we've done really for him to help him out even given him money at times he needed it. This is why I feel so betrayed, so hurt, and embarrassed. I feel like our relationship is over. I told him I needed to talk to him and he turned his phone off (which I gave to him😒) and haven't talked to him since 8am. He hasn't tried contacting me at all. I fear I won't be able to go through with leaving him since we've been together for such a long time and are now expecting our first baby.

How can I tell him without anger that I can no longer be with him? 

Any advice helps really.

Thanks.