When are you too old for Forever21?

Ever since high school forever 21 has been one of my favorite stores. I’ve always liked their styles and found some of their basic pieces really cute and versatile. The other day I was shopping with my friend and wanted to go there, but she said that we were too old for that store and that it caters to high schoolers.

I am 23 now, and at first I thought she was wrong. But now that I’m thinking about it, am I too old to shop there? I’ve seen women older than me go there and didn’t think anything of it.