Fitness Classes

My mind is whirring today ;) i was jsut reading on the ww forum about someone who does 4 pump classes a week...damn i am envious! I really really wish i felt comfortable enuff to do classes...i know u should have the attitude that I am doing best for me so who cares what others think about it...but u know i do care! Im not miss confident in the gym and maybe i never will be but i really really wish i could feel comfortable and not out of place at them...i would go to the gym more often. I know i simply should not care what others think...but when ur my size and also when u have been 171 kilos and dont think u really have that ability...its hard to get my head around it. I know people think i exercise a lot (and i guess in essence i do) but i still doubt my ability to do stuff...whenever fiona gives me new stuff im always like what? are you serious? On saturday fiona had me do a squat against a wall...while doing boxing jabs and uppercuts...sounds easy enuff eh? oh did i mention one leg has to be off the ground while doing it? She showed me and i just looked at her like she was a mad woman (which i think she is ! lol) but i was like...i cant do that...and it took me a bit to get use to it but i did manage...but it just makes me realise how much self doubt i have especially when in the gym. I really just wish i could say f*** it and just get on with it...