Some of the comments are insane. Can't OP find any aspect of parenthood boring? I know I do occasionally!
You are not being a shit mum by saying that occasionally you want to leave your house! Yes, you are a mum, but you are still a wife/gf, friend, daughter, sister or whatever you were before (writer, dancer, runner, reader, drunk 😉 etc) and wanting to dip a toe back into your pre-child life occasionally really isn't that bad.
But OP, do something about it if its bothering you.
What would an ideal week/weekend look like for you? If it is simply watching the sun set on the beach occasionally, go and do it! If it is getting away, could you arrange to go for a minibreak to a city with a friend every so often. If it is spending more time with friends, can you go to theirs/have them to yours? If it is going out with DH, can you arrange a babysitter occasionally?
My connection to pre-parenthood life is a bookclub which meets once a month. We have buckets of booze and talk like women rather than as mothers (occasionally we even talk about the book, but it is usually a space to vent about challenges of parents, in-laws, relationships, work, money, health, menopause, aging, kids, studying, weight, hobbies etc. We do obviously talk about the kids, but is hugely beneficial to my mental health to have an outlet that a) doesn't revolve entirely around the kids and b) let's me vent about the kids without them being in earshot.
Can you find something that gets you back to your old self, even if it is just one day a month?