If he doesn’t wanna tell you then just let him be. Some things are just too personal and hurt too much, he shouldn't be forced to say them just because.
For sure but I can understand where the anxiety comes from for Seo-An since he views it as Woowon hiding things from him because he’s “weak” (untrue but the stigma around mental health leads him to believe so). But in reality for Woowon, he’s just not ready to open up which is totally fine
If he doesn’t wanna tell you then just let him be. Some things are just too personal and hurt too much, he shouldn't be forced to say them just because.