I've felt just like you OP, and I feel your pain. You say you love being a mum, but in the early days, I actually hated it, and resented every second DP spent out of the house, even for work.
What made things ok was getting DS on a bottle so that we could be proper 'equal parents', then getting a calendar and writing stuff on it.
The other thing that made it better was DS getting a bit bigger, and a bit less hard work!
I think of it as a pennies in the bank system. I love weekends away on my own, so I don't moan too much about DPs hobbies, as long as it's kept fair and equal.
I was in a very bad place when DS was a wee baby, I became obsessed with getting out on my own, I saw it as an unattainable luxury that I would never have again. Of course, I can have it again. In fact, I usually find now that I prefer to stay in - it was losing the choice element that did for me.
If you're generally ok, not depressed etc, then I say suck it up for now. You'll be 'owed one' big time, and when it comes the time to cash it in, you'll be glad you did. If you've had a hen night already, then you don't have too much to worry about?
If you think you might be depressed, well, come back and we'll help you.