I admit, i'm 25 and still single, I don't care. I have all these games and other collectibles. I never want to part with them even if my future gf/wife wants me to. I'll be very upset,lol.
If she wants you to part with them then she ain't worth it. Asking someone to give up a cherished hobby is a big no no for me.
If she just thinks it's weird, well then that's ok. :)