How do I avoid this problem?

[Lea]

I'm talking to an older guy who works in a shop near me. We've been talk over Facebook for a few days and I am starting to like him but he doesn't know that I'm quite a lot younger. I am 15 and he is 21. Do you think it would effect any chance of us meeting up? Or should I just avoid telling him?

[Adam]

I don't want to judge but hang on a sec you are young if this guy falls for you, his life will be over he can get arrested, no one can tell you what to do but just take a step back and make sure you will be fine.
Good luck.

[Eli]

i think u should not he might feel that u r too young for him. Kind of like a 10 year old crushing on a 17 year old.