Can't forget my first crush?

well long story short my first crush was when i was 10 and i crushed really hard on her for like a year then moved schools and drifted apart and never built up the courage to tell her how i felt i took me years to get over her but i got there at the age of 13 im now 19 and had forgot about her for years and saw her walking down the street today and i swear time stood still and all those rep-rest feelings about her hit me like a ton of bricks and now can't stop thinking about her obviously i don't want to ask her out because that would just be weird and i don't want to so any tips or good songs to help me move on AGAIN because i'm at a loss here cheers guys