You are pregnant, yet to see your baby, a baby that will be placed in your arms if you allow, that feeling is different from pregancy, especially when you have a partner who has been less than ideal.
I've known many women, especially with their first, being utterly terrified of their lives ending and changing, and those many women have had men who were equally scared or unsuportive on the lead up to the birth.
In all honesty, I think any woman would say, regardless of how hard and unsuportive the pregancy was, when the child arrived they felt completely different, a love completely different to anything you have felt before.
I'm not saying this to make you make a decision, I'm saying it so you don't make a decision, not just yet.
Please give yourself time, to heal from this shock firstly, self care and allow others to care for you, you deserve sympathy and love from others, he deserves... well I can't say.
Your life is not over, a new chapter is just beggining if you wish, just allow yourself to have that choice.