It’s obvious that Garam went through some sort of trauma from his first relationship because he doesn’t even want to talk about it. Jaehyuk’s feelings are also valid because how is he supposed to know if this relationship isn’t one side in a romantic sense.
It’s about building trust and patience, Jaehyuk proved that he can also be emotionally supportive. However, it’s clear that it’s a really touchy subject for Garam and has ruin his way of how to be affectionate, to a point that he can’t even express words like “I like you” ( I can relate lol) but yeah Garam does need to talk it out.