I see you are somewhere in our area of the foothills. Sometimes these hills can be discouraging, especially if you don't ride them 3-4 times a week. Sign up for the Stockton Bike Club's Delta Century on May 2nd. It's flat. You'll have a change of scenery out in the Delta and vineyards. I like the 100k.
Whatever you do, don't sell your bikes, just take a break.