<human>: It's a simple and classic problem. 

I've known the guy for about a year and we're very casual friends. We have the same friend circle and it's nice to hang out in a group setting, but our personalities don't really match and I don't enjoy spending time one-on-one. 

I've always had the feeling, that the guy's into me, but some time ago we've hung out alone for the first time in a while and his comments made it very clear, that he sees me as more than a friend. He's the type of guy, who doesn't come out and say it, but on the other hand doesn't stop trying. Whenever he compliments me or makes a "romantic" comment, I either dismiss it, ignore it or outright tell him, that he's being weird; but he just keeps going. 

Yet, because he never outright asks me out on a date or tells me he's interested, I can't outright tell him, that a relationship isn't an option. Some people have suggested, that I should emphasise, that we're such good friends and what not, so he understands I view him in platonic light; but I know, that some guys misinterpret shit like that.

So what options do I have outside of telling him "dude, I think you're into me and I don't want that"? If he just denies that statement, it'd put me in a really awkward position. What is the most graceful way of handling this situation?

Can you summarize the given text in a few sentences?
<bot>: Friend, I'm not interested in, likes me, but won't say it outright. How do I tell him romance isn't an option, without starting with "so, you're into me and you have to stop"?