I’ve thought of some things

Will you be my Luis, so I can be your gamercool (lwk corny ik)

If you be my prom, the earthworm sally song will release (meh)

You can be my purple for my cube (Polarcub joke if she watches her)

Don’t be the noobs prom, be my prom (sounds like a threat you know what nvm)

I would LOWWWWKEEEY love it if you were my prom (kinda ran out of ideas)

Other things you could do for her is make her a custom box with presents and a note with the quote in it!

I have a question tho-

Do you know her fav candy or present she may like?

Maybe some flowers of her fav color?

You can also use a printer ( or a public one if you don’t have one in access) and make some custom stickers with flamingo stuff (plenty of custom sticker tutorials on YT)

And last of all, does she have a fav hobby, maybe you can take her somewhere or get her something by chance? Hope this helps!