"You're too ugly for me."

I don't really, I'm friendly with everyone. People get the message when you don't show obvious signs of interest in that way for them.

I can't at the moment, I'm sorry! ):
I just broke up with my partner and I need more time to heal. (it's corny but works)
I want to focus on my studies/work at the moment. :/
I'm not interested in relationships right now, sorry!

I always use 'sorry' or ): just to soften the rejection. Kii! Sometimes if people ask me out on a date, I say I can't this week and they usually don't ask ever again.

I stop texting them/replying.

"no thanks"

"I found someone with money"

If he's a twink just say "sorry, I'm into the jock type" or something like that. Say you prefer the opposite of them.

"No, sorry"

It depends on how they hit me up. I try to be extra nice to them because it takes a lot of courage to go for a guy you like.

sorry i'm not enchanted to meet you.

I usually tell I have a boyfriend/girlfriend.
If that doesn't work, I say I'm not interested. People at first look think I'm serious/distant, so it helps.

.

Just tell that you appreciate that they like you but you don't feel the same way like they do for you.

Don't ever be a dick. Useless the person in question is still trying after this.

The same way Lily Allen does on 'Knock ’em Out'