I'm sorry your in this situation And yes he sounds like a complete *** He definitely has NO right to treat you this way.
Maybe if you feel comfortable enough you could tell him your feelings... but I don't know how that will go He sounds pretty heartless. I also recommend talking to a professional about this for sure... like you said your going to the health clinic which sounds like a good idea
Sadly there might be nothing you can do to change him... it may just be who he is.
And sometimes although it may be hard... you have to be the bigger person and forgive...
I'm sorry