I have to say I agree with everyone, including Shootingstar. Two things struck me. One, I am Sarah. I am not training, but I choose riding buddies carefully, because if they drop me, I get mad and frustrated. I've been known to cry during rides because of this. I don't need the breaks, but I now know who I can ride with and still feel good about myself. It's a constant battle between accepting the fact that I have become a little slower and the fact that I am fitter than 95% of people my age. I'm comparing myself with you guys! Yet, seeing someone whom I think I can drop gets me angry enough to try once in awhile. Frankly most of the time, I just ride alone or with my DH or with our friends. My closest riding friends (women) are both much, much slower than me. My rides with them are just as enjoyable. I just wait at the top of a hill. DH rides at my speed when he is with me; if he has the urge to go "faster" than he can go alone. I don't enjoy constantly trying to catch him, or being alone on a ride where we are supposed to be together.
The part about her getting mad is just immature. She needs to accept her level of skill and find people who are at that level.