I work in a clothes shop that only sells girls clothes (other branches sell boys stuff)

I work with girls and pretty much all my friends are girls. I feel drawn to wear clothes that we sell as I think they’re much nicer and more interesting than the boys stuff (which is nice, but can be a little boring.) I tend to pick the more unisex stuff but sometimes I may wear a long skirt or something (I think they look really cool with my Doc Martens or my Vans.)
I’m a bit self conscious to do it outside of work in case people are nasty to me. I wish I was a bit braver and didn’t care what people think, but I do.