This morning instead of waking up at 4:40 I slept in until 6:00 am, so I missed my morning class. I was tempted to stay home but thought of you all

and went anyway. I figured I'd work on my endurance on the treadmill -- after the experience I had last week (when I had to leave the class in the middle because I couldn't do the running) -- I thought "I'll go back soon enough when I train myself to run for longer periods of time without stopping". I should also try practicing my push-ups on my own time. That way when I get to class, hopefully I'll be able to do more without stopping.
WaterRat - I think Dr. Phil is right.
I went to the gym one afternoon and as I was waiting in line to ask the receptionist a question, I noticed I young fit-looking guy in his early twenties (someone you'd expect to be pounding the punching bag and doing his fancy footwork) getting tired from punching and kicking the bag in his boxing/kickboxing class. I noticed him stopping for a few seconds just to catch his breath. I guess I was surprised because I must have had this false belief for so long that thin person = fit person. Not necessarily true. I feel a little guilty admitting it, but it always makes me feel better to see someone overweight/out of shape in the gym working out because I don't feel like everyone is an athlete but me.
All of your comments are really inspiring, thoughtful and helpful, and I really appreciate everyone taking the time to give me that boost of confidence and motivation. This is not a small issue for me -- it's something I've struggled with for most of my life and to know that all of you have been there or are currently struggling with the same situation I am really helps me to continue on my struggle. Yes, it is a struggle, but the rewards will be great -- as with everything that is difficult to acheive.
By the way: Karma - very cool story. I'd love to be mistaken for the instructor! That'll be one of my goals
I'd love to hear more inspiring motivating stories, if anyone has any! (... and I'm sure that many other members will benefit from reading them too) So please continue to post your inspiring stories!!!