It might help to consider your mindset about that hill. Is it really that you can't make it up that hill--or that you can't make it up that hill as fast as you want to? Maybe if you let yourself go up that hill super slow, in the lowest gear you have, you can make it.

I hate telling someone it might be all in their mind. So, I have a couple other suggestions. Get a smaller chainring on the front, a granny gear. I love my 22 tooth granny gear; I've heard of even smaller, 12 tooth chainrings.

Consider driving part and biking part of your commute. That may or may not cut out that hill, but it might make it easier to ride every day.