They like each other. Yeah, there will likely be drama once Juheon finds out that Dohoo didn't like him romantically at the beginning, but this last chapter is Dohoo realising he has feelings for Juheon. It's confirmed on the epilogue.
They'll be fine, he's most likely referring to the fact that it's the first time he's feeling that way, and towards a male friend too. *Both* couples will be fine ;)
They're so cute and sweet, but Jackson is my favourite haha