I get jealous

There's lots of things that I know just can't happen for me, but sometimes I get bummed out about it. I get jealous about someone with a child old enough and responsible enough to watch the little ones while mom runs an errand, gets a shower, gets a nap or does housework or cooking. My 13 year old daughter is NOT that kid.
Other parents get to leave the house without kids, sometimes even for a couple days. I'm stuck at home or dragging kids with me wherever I need to go.
Other couples have regular date nights. I don't recall the last time my husband and I went out. It may have been while we were waiting for our 20 month old child to be born. We have tried a handful times, but things don't work out for whatever reason.
Most families take trips. We can't. Traveling involves too many things that Calliope has a rough time dealing with, so it's not worth it.
Lots of parents enjoy a night at home being a couple because older kids are off at a sleepover. My older one hasn't been invited to anything aside from a birthday party where the whole second grade was invited. She doesn't have friends, so she's home all the time and talking at me.
Go ahead and tell me how great the concert was, how nice dinner out was, how much you enjoyed Disneyland; I don't turn green.