Boyfriend is a crossdresser I think?

The fact that they are your underwear gives you the right to ask for them back. This boy obviously has something going on. Wearing women's underwear, especially out in public, is not something every guy does. If I were you, I would ask him why he was wearing your panties. If he tells you the truth and you can handle it, then everything should be ok.

but, if he denies wearing them and you are still convinced he had them on, then I suggest you end the relationship. If he lies to you then he is hiding something and that would not be healthy for you or the relationship.

You are both still young so there is still much for you two explore out in the world. If you are not comfortable then move on.

Just ignore it. Guys love panties (even though girls don't get it). So every guy goes through a phase where they want to play with panties (some, like me never get over it). But most likely he is just exploring something.

Now if you come over and find him in your bra, panties, skirt and camisole. then you should worry:)

Even if he does like to cross dress, its actually pretty normal and common and has nothing to do with his sexuality.

Maybe it's some weird way that he's getting off. Like the guy before me said.I wouldn't worry about it unless you catch him in full costume!