I'm glad you can't relate with the struggle of people who suffer from abandonment issues. I hope it stays that way.
I know it's frustrating for us as readers but it's something that Taemin finds really hard to do. I feel it was easy, he would have told him already. Taemin has the right to tell him whenever he feels ready. I know you probably were just expressing your frustration so I don't take offense at this comment.
at first, it made me irritated as well, but you have to consider it from taemin's perspective. he's afraid of being completely abandoned again without any explanation whatsoever, which is entirely understandable. having someone significant to you just suddenly disappear from your life without a single trace is incredibly damaging and terrifying. his reluctance to reveal himself to woojin is his way of protecting himself and preventing any further vulnerability, and for readers to trivialize his weakness like this just shows a complete lack of sympathy and understanding.
This manga makes me so frustrated.... Ughhh. I just wanna...ugh..just tell him who tf you are already