How does Valentines day work?

Katja

Hello ladies, I'm originally from Germany and studying in the US. I've been with my (American) boyfriend for almost 5 months and I feel like I should do something for Valentines day. It's not really a thing where I come from (more laughed at for being a florists PR-stunt). Do I have to get chocolates and stuff or is anything romantic ok? What do you do for your SO? I would love some inspiration.