1) get rid of the cycling computer.
2) ride whether you want or not.
3) instead of hammering or going as fast as you can, take it easy. Smell the roses, look at the scenery. Don't check the time when you start or finish. Ride like you did as a kid, coast down hills, pause and listen to the world around you. Cycling is great and approached this way will always make you feel better by the ten minute mark. Competition with oneself of others can easily become drudgery.