Because Xi automatically assumed gay rather than jianyi being in love with him... DESPITE EVERYTHING
SO MANY TEARS OMFG ; A ;
The point is that he likes him not that he is gay and that's the main reason he started crying. Because Zaheng didn't get that
But... usually, if someone falls in love with his/her best friend who is the same gender as him/her, it does happen because that person is gay, (and obviously also because he likes the other person a lot...) otherwise, he/she would just feel brotherly love towards his friend, or nakamaship(as a huge friendship) but it would be platonic love.
I mean... do you think the question was wrong? If I was Xi Xi I would also ask frist "....do you like men?" and then I would ask " why did you kissed me ? do you have feelings for me? are you lonly?... please tell me, I want to understand you because you are my best friend"... still, I would ask first if he is gay because asking "are you in love with me?" is like more hurtful, and I wouldn't want to presume his feelings without listening what he has to say
Although Xi Xi is being SO dense... I always thought he supected Jian Yi's feelings but was being tsundere and maybe a little scared...
then I remember I'm also super dense and it's obvious from the reader perspective but it's not always obvious from the characters point of view
Actually no, falling in love with a person of the same sex doesn't make you gay, there are a lot more factors that contribute to one beeing gay than falling for one person of the same sex. So yeah, Jian Yi can be in love with Zhen Xi even if he's straight, he can even be heteroflexible, bisexual, demisexual, etc, it doesn't matter.
I also don't think the question is actually wrong, most people will ask the same question, but seeing how Jian Yi never showed interest in another guy other than Zheng, and the fact that he always gets a little too touchy and sexual just with him is something Zheng just ignored, yes, maybe not on purpose, but he still did, and it hurt Jian Yi.
But even if I don't think the question is wrong, I also don't believe it's right, I think that asking "are you in love with me?" first would be much better than asking "are you gay?"
I mean he's just asking him if he's gay,but there's still this heartbreaking feel...