Wat to do when you have a crush on a gril bud she is 16 and your 22 :s?

met this girl wille agow :) kind a liked her from the stared bud after kissing and hugging this one night i tink i have a crush on her :s lol thats like years agow I had one like this :p bud she is so much younger :s can t tell it to annyone :s cours promist her that :s what do you guys think what should I do now ? kind a cya her alot for some reasen but kinde freez cours don t know what to do whit those feelings :s