I want to meet with a good friend next week because it should rain so we can't do anything outside, would you have an idea what you can do except look at Netflix?
I love to cook with my friends together.
Talk? About things that move you?
Play a game together. Maybe your girlfriend has this - https://www.mifus.de/turmania-holzspiel-ab-5-jahren.html Turmania is the name of the game. It's totally fun.
Play a few board or card games. For example, chess, monopoly, uno or human do not fret.
"I see something you do not see" you can play as well.
Truth or duty is also funny. Do you know for sure?
If your girlfriend has a loft bed, you can make a cave with blankets. Did I do it with my girlfriend? Inside we used flashlights so it is not that dark.
Hope could help!