Jealousy

I’ve got a little dilemma, tonight my parter and his friends went out to dinner which I was invited too but then I had to baby sit to earn some money so I stayed home to babysit tonight, no biggie. I called to see how the dinner was going because they went to a fancy restaurant, when I called he said he is going drinking afterwards at a bar which I didn’t know about. We are currently trying for a baby and we’ve been trying for 11 months now, I don’t drink alcohol and I’m feeling a little left out, they invited me to join them after I finished baby sitting but not much point in me going if I can’t get drunk like the rest, this is so petty and silly but is it normal and okay that I’m jealous that my parter still gets to drinks and go out late nights while I can’t?

Should he be more considerate to my feelings or am I just being stupid ?