Marriage is a partnership, partners don't give ultimatims. Your hubby needs to start seeing you as an equal, and a competent adult.
Are you actually clumsy, or do you make the same mistakes all of us make, and he is throwing it up in your face, to belittle you and make you feel small?
If he won't go for counseling, go for yourself (try your school first). Good for you for your determination to stick to your guns. Don't let anyone convince you that you cannot do and succeed for yourself. Its easier having a partner, but not totally necessary.