You are brilliant. Well done for breaking free of this vile abusive man.
He's messed with your head so you didn't know which way was up. You started to believe his nonsense. But please be certain you have done absolutely the right thing.
Think about it - your Mum and Sister don't like him and are pleased you've left him. He treated you as a slave. He told you you wouldn't achieve anything with your degree. He thought your degree involved doing nothing all day. He thought your time was worth less than his. He thought you should give up your own time and money to help him and make his life easier.
He's called you mentally ill, a lesbian, bad in bed, a cheat and more just because you broke up with him.
He is not capable of having a healthy loving relationship and there was nothing you could do to change that. You have done the only sensible thing and removed yourself. If you'd stayed with him he wouldn't have magically got better. He would very likely have become worse. And it would have got harder and harder to leave, as your lives became more entwined and he got more and more in to your head.
You've seen the light. You have the support of your Mum and Sister, and some counselling to help you get back on track. You are young, you've got a bright and exciting future ahead of you. Throw yourself at your studies, friends, hobbies etc. Before long you'll not be missing him one bit and you'll be thanking your lucky stars you gave him the boot before you wasted a day more of your life on him. You will emerge from this stronger.
And hopefully you will have learned what you need to learn in order to avoid this type of person in future. Don't ever forget that a healthy relationship involves 2 equals, with mutual respect, support, care, encouragement, interest in each other, sharing the workload, sharing the worries, looking after each other. You deserve that and only that. And in the meantime much much better to be happily single.
You were far too good for him. He knows it. He'll fight for a bit to get you back (although calling someone all those names isn't the most intelligent move!) but only because he knows he's lost someone much better than he'll ever be, and he's lost his slave who made his life so much easier. Forget all about him. He doesn't deserve a moment's thought.