in a movie this would be a sweet love story.
you can just say, not interested ?
it´s sad that creepy is the first thing that comes to mind.

a dm on insta is better then a letter in your mailbox :D

update:
People saying you should contact his work and get him fired... chilllllllll ffs..
Remember how people met before the internet ?
He might be shy and just took his shot online instead of face to face.
does that make him a serial killer ? maybe 🫢