am i a recluse?

well. i was invited to go out with work friends today to a pub in the city. i wanted to go to be sociable and also because these people are really easy going and i get along with them really well. i was a little anxious about having to go and drive into the city and also because im feeling fat. god i was thinking of every excuse i could think of not to go but i felt that if i dont go i wont get invited to other work gatherings.so i decided stuff it im staying home i cant be bothered dressing up and going out,i will stay home and play around on the pc and even have an arvo nanna nap! i find im sleeping alot and am not that motivated to do things. am i slipping back into depression?am i a comfotable content person within myself to stay at home and watch dvds,tv,listen to music,tap on the pc and to see my partner at home and do the above? do i feel threatened by others? i dont know. i tell myself from time to time "i want a life," its just hard to make those steps. am i turning into a hermit/recluse?