Is my fiance really worth it?

I'm asking this because i need to understand if i am being irrational or he really isn't worth being with....sorry if this is really long, it's just really complicated.....we've been together nearly a year and it started out amazing and 90% of the time it still is but i've noticed he has a really angry side and gets angry at the smallest of things, for example, me not getting out of bed straight away as soon as he asked to take him home, he had a hissy fit and started calling me lazy, selfish and over sensitive because i get upset when he shouts at me. he says he cant cope with me when i am down because i get down about silly things....i disagree with him, i am down sometimes because i have had some money trouble and i have recently had an abortion and 100% regret it and hate myself for it, i did it because he wanted me to and somehow convinced myself or maybe he convinced that it was the right thing to do. i dont feel like he's given me a chance to grieve and gets angry at me when i try and talk to him about it. when i say im going out with friends the first thing he says is for me not to cheat on him, which i would never do, i really do love him but i feel like he is trying to change me, saying things like grow up and that im childish, selfish and over sensitive. I am actually starting to believe all these things but only because like i said 90% of the time he's great.Please help, please tell me i'm not convincing myself....i really dont know :(