How would you celebrate a girls birthday you ain't seen in a year

Last time I saw this girl was last year, she used to like me 3-4 years ago I should of took things further I really wanted to see her today but I couldn't she's got a man think she used to fancy me 3 years ago, miss them times I wish I could go back btw I'm 19 nearly 20 she's 19 and a Muslim

I always used to ping her on bbm, and flirt with her from 16 now life's a struggle at 19