I used to love my husband but now I can't stand anything about him not even the way he chews, what's going on?

Sad. U may benefit from family therapy what u like about each other and what u don't like, try to iron u differences, and make time for u and u husband to enjoy each other companies.
You have given up. Maybe not intentionally but nevertheless you have stopped loving him. Love is a choice we make for many different reasons but still a choice. If you write down what you liked and disliked about him when you married him and write the likes and dislikes down about him now you may be able to figure it out. When did you stop loving him? That may help you understand and make the right choice.