Am really sorry that you were in such a hurtful situation, I can see how that would lead to you feeling destroyed by it all
I can understand the impetus to want to hurt someone who had hurt you, or to try and make them understand the damage they've done you - I really do! That said: I think often, though, the reactions one would hope for (from him) in such a situation, are unlikely to be the reality. I'm not convinced he would be sufficiently remorseful to the point that you'd be able to move on - especially given his callous behaviour and him dating and impregnating you, even though it's against his family's beliefs (and possibly his own religious beliefs). He most likely knew it would end badly/with you two not being together forever, and perhaps never had any serious intentions towards being with you in the first place. All in all, he doesn't sound like a thoughtful person, so I'm not sure telling him would elicit a helpful response for him from you, towards you moving on.
I think it's important to give yourself plenty of time and not pressurise yourself into feeling any differently anytime soon. A year, in the grand scheme of a whole lifetime, is not that long - particularly when it involves big decisions like an abortion. I'm not sure how old you are but you will almost certainly have future experiences of love and stable relationships that are going places and will result in happiness. In the meantime, please try and be kind to yourself. It's traumatic and always will be - but time is a healer, albeit a slow one. So just allow yourself to feel and process and grieve the lost relationship (and the lost opportunity to be a mother, if you wanted it at the time/now).
I wish I could say to you "do X and you'll be fine" or "in Y amount of years, you'll feel much better". There are no firm roadmaps for these kind of things. Keep talking to people you can trust, and maybe seek out counselling or therapy so that you have a space to express your true, raw feelings.
Wishing you all the best