I get caught up in this too if I am not careful. My DD's Bday is in November and mine in December, so those things slow me down too. Mine is no big deal to me, but my mom and sister make a HUGE deal about it. This year we had a lovely weekend out of town. I digress...
I have come to realize those other moms, they are running on pure adrenaline. I am betting they are tired, and miserable. If they are not, more power to them. I figure my kids are happy doing what we do, and are much happier having a calm and rested mom than the big B I would be if I went and did everything I would like to. I work and raise two girls. I do what I can, and that is enough.
You are doing enough too. Just enjoy the times you do have and don't stress over it!