Do I Still Maintain this Friendship and How?

I have these friends in uni who I generally like and hang around a lot with. The problem is, they’re all women and they tend to vibe with each other better than I do with them. As such, there a lot of times where they just end up hanging out without me, plus they live on the same floor too and at times it’s made me feel kinda rejected. I talked with one of them and she said that the idea is there are certain things that they do like shopping where I wouldn’t really be useful or belong if I hung out so it’s more of an “all girls activity” whereas most everything else I am fine and she has insisted no one hates me and that just because they do things without me doesn’t mean I’m not a valuable friend (which to be fair, they do still tend to accept me around). I’ve kind of accepted that but it still makes me feel unsure and I’m worried that by them setting this one boundary, they’re gonna eventually set more until I’m pushed out forever. What do I do? Do my friends still like me and are they people I should be around? How do I find ways to make my friendship stronger?