Okay... I have a guy brofriend... Not boyfriend.

Don't be straight-forward with him. I know this sounds like bad advice, but I'll tell you why, and I'll speak from personal experience. He sounds like the angry type. If you're straight-forward with this type of guy, he'll end up lashing out on you. And when he lashes out, he'll do the MOST dangerous things, possibly hurting himself or you. The best thing for you to do is to keep your distance away from him--don't talk to him as much. It's alright to talk to him once in awhile, but once he's used to not talking to you as much, he'll get over you. The people who are telling you to be straight-forward have obviously never been in a situation where an angry man is obsessed with them.

a very subtle way a doing it if you hang out with him often is to emphasize how he is a "Good friend". Every now and then when a joke is made or he says something nice just say " you're such a good friend"/"You're an okay friend" Or create a fictional crush and bring it up when timing is right. don't go on and on about it, but just randomly slip it out like, "oh Gakupo is so (insert random cliche or weird you like about people here)" and if he asks about it, just say something simple. Or just calmly ask him "what are your expectations in this friendship?". You can say how an article you read talked about how people have "hidden intentions" and often than not its a good thing to ask friends why do they wanna be friends and yada yada yada. Sorry i don't really have good tips that don't sound moronic. (I'm currently in a situation where an aggressive someone is being the"nice guy" and believes my relationship is me pretending to go out with a crush and that should mean he should keep trying to get me to date him ... so these are things that helped me back him off because he refuses to believe i'm with someone) ------------------------------------------------ But just to say, you shouldn't have to put up with someone's mess for protection. (especially since he seems like the type who will say how his actions should be reciprocated with a romantic relationship )

Be blunt and honest. If he pushes you away or gets MAD you won't date him, he's not in your friendship for the right reasons.