Today, I met with a couple friends. It was nice to see them and we had a great time together. I was really close with one of them. Let's call him "X". We were planning to go somewhere and X said he may not be able to come. When I asked why X said it is a personal thing. Then another friend of mine said that he knows why he may not be able to come. As I said X and I are pretty close(or at least that's what I think). When I insisted him to tell him why, he refused to say it. He is Ok with sharing this personal situation with another friend but not me. I felt very upset cuz I thought X and I were really close. Now I feel like none of my friends think I am trustworthy and I feel like an asshole for insisting.