I feel like this should've been addressed much sooner than now.

I highly recommend you admit to it rather than hide it. If you feel strong about it, own it and tell her. If she accepts it, great. If it's a deal breaker, it was never meant to be. Wear your lingerie with pride one way or another.

As the son of two LGBT+ parents, lemme just say this - you probably are not going to give up wearing lingerie for her, at least not long-term. Sooner or later you’re going to want to do it again, so you can decide if you want to tell her now and deal with the consequences or wait until you’re married 10 years with two kids and a mortgage and get caught.

I'm confused. She's your girlfriend and she doesn't know about your underwear? How can this be?

Did you see that guy Mark Bryan in Germany? Channel him.

No shame in wearing what you like, although it could get confusing on who's who

This should have been addressed long before now, but really needs to be before you move in with her. It's a part of who you are. Attempting to give it up is going to eat at you and cause eventual resentment, and if you pick it up again and she catches you, it will be ugly.

I doubt this is a big deal, if anything it's kind of just fun and kinky.

tell her before you move in. Chances are, she won't care

I feel like this is a conversation that probably should’ve already happened. Gotta tell her and hope she’s cool with it