Why does having to walk up a 15% grade make you a loser? 15% is freaking steep! Heck, even walking up a 5% grade doesn't make anyone a loser.

There are things you can do regarding gearing and training and such that could help you get up that hill and I'm sure you'll get lots of great advice from ladies here. But the first thing I'd suggest is to stop thinking of it as something that you should be able to do and begin seeing at it as a challenge you'd like to work towards. Then go from there.