Guy younger than me is flirting with me with facebook messages.what to do???Help!!(I don't like him)?

[estri]

So I have known this guy for a couple of years but we never actually talked before.Maybe because when I was younger I used to be kinda ugly.
He is a year younger than me.
So today he sent me a facebook friend request and I accepted it.The minute latter,he wrote to me.He wanted to talk with me but I didn't.I didn't want to come out as rude so I replied.We started a short convo.During the convo he sent me a lot of emoji kisses and I was kinda uncomfortable.And tryed to skip these.I'm pretty sure he is hitting on me.
I don't really care because he is wayyyy younger than me and very short and skinny(i'm very tall and kinda overweight).
My problem is that he will write to me again and I just don't want to have a convo with someone who is always fitting and flirting with me.When we ended the convo he added "talk to you later" and like a thousand kisses.I just don't want to be rude and be like:"get the f*ck away from me "!
So what do you guys think i should do?I need some advice...

[VanessaG]

You need a backbone, just cause someone messages you doesn't mean you have to respond.

[Help Me!]

Just ignore him, he'll get the message.