What am i supposed to say back to this?

but yea over the weekend I was like hmmm this girl is kinda cute but now knowing your age im kinda not seeing it anymore because I really dont want to rock the cradle that much

what am I supposed to say back to this?

I went to VA Beach with my...

friend Kirsten her family. Her brother brought his friend Kevin. (the message in quotes is from him) He's 18 and im 13. I'm not interested in him.

Tell him you're not interested in him.
Basically give him the facts, like you did not want a relationship with him to begin with, so you have no idea what he's talking about.

I mean, just tell him how you really feel.
Honesty is the best answer.

Hmmm, being that he's sounding so arrogant. I guess you could ask him what it's like being almost over the hill?

I dotn want to be mean hes one of my close friends.

Well, by his quote, it sounds like he's smart enough to realize that you may be cute, but you're way too young for him...I would leave it at that...seriously.