Unhealthy relationship

I am dating a guy and i know our relationship is not healthy. I can't express how i feel cause if i get upset he gets mad and says that im whinning. I try to talk to him about things that are bothering, and he gets madand turns everything around on me. He puts me on guilt trips, points out my little mistakes, vents his anger towards me, doesnt trust me...but of course with all unhealthy relationships, it isnt all bad. He does make me happy alot of the time and hes not always like that. But i know the number one sign of an unhealthy relationship is beign afraid of saying whats on your mind out of fear of his reaction. Hes trying to make me think that his behaivor is normal, and i know that its not. I KNOW i should not bother with him, I KNOW that you shouldn't stay with someone just because you love them I KNOW i should run and never look back so WHY CANT I! I'm not stupid, i see all these things but i feel so stupdi cause no matter what happens, i still want to be with him. He is my first love. He has high goals fo the future. He wants to have alogn term relastionship with someone that he loves and that lvoes him, and it hurts me so much knowjng he will never find his happiness because of how he acts in his relationships. Ive tried explaining it to him, but he's in denial. I dotn know what to do, actually, i do know what to do, but it seems like i cant. HELP!

love is a crazy thing, you see the good in that person when maybe no one else does and you want to show people that side of him that you see but sometimes its just better to forget.i can tell youre a very sweet person and you deserve a good guy that you can talk to about anything.i really hope things brighten up for you...
blessed be