I stare at people who I find attractive, before I realise I’m doing it. No harm in chatting with her next time you see her, and asking if she wants to get a coffee sometime :)

Worst case: she says no (no biggie)
Good case: you make a new friend!
Great case: you dare for a number of years
Best case: you grow old together

My metaphor lost it at the end, but my point is, you don’t know until you do :) give it a shot!