secret crush coworker

hey everyone, i started working from home last year and it's been pretty lonely. a few months back i met this guy at a coffee shop near my place. he was super nice and we just kinda chatted for an hour. ever since then i can't stop thinking about him. i check his fb page daily even though we barely know each other. wondering if its normal to feel like this? should i just give up on it or try saying hi again?