Like we all say, the more you want someone the more you push them away. Garam didnt have to leave like that, he probably didnt think about how hurtful it would've made jaehyuk feel. Then again, garam is also not entirely in the wrong. They are different people and the concept of getting outed is different for both of them, and the way jaehyuk wanted to do it wasnt the best but, garam is just suffering from his own truama which is probably why he refuses to understand jaehyuk's way of doing things