I'm not a chick, but from a guy's perspective, you could do worse than go up to a single guy you like, start making smalltalk and then say
"Hey - It's Valentine's Day this weekend and I thought it would be a good excuse to ask you to take me out somewhere"
Only do this once, because to be desperate for a partner on Valentine's is the height of Suck.
---
Please replace the handset, and try again.