I would also ask, is there an age difference?
From what you said in your OP, my gut instinct is get out and get rid. It seems to me you're feeling miserable as a result of what's happened. Her dad isn't going to go away and it sounds like he is more involved than he should be, given you are both adults.
You have to live you best life and even though you might feel a loss and that's always hard, but you have to judge for yourself where the future lies and believe in the decision you make which I sense will be, move on and away and you may be all the better for it.