You are happy about being pregnant, he is not happy for you. And he reads like a passive aggressive manipulator.
Honestly it sounds like you need to drop that rock. But thats just me.
Breaking up with someone is about YOU.. not him. So if you need to break up with him, and it sounds like you do. Then do it.
Staying with someone unhealthy because of a kid isn't a reasonable expectation.
Is this an abusive relationship. How can I get out of it?
Yes. And you walk.
.. it really isn't hard to break up. To take the famous words of a sporting goods company "just do it". You are pregnant and these should be the happiest times for you.. enjoy them...