What would you do?

Tonight was my bridal shower. My friend who lives elsewhere was coming down this weekend so we planned it so she could come. She didn’t, didn’t tell anyone why, no text call, nothing. Apparently she went to a concert with friends. She is such a sweetheart and this is super out of character for her. Then she texts my roommate to ask if she can stay at our house tonight before she leaves tomorrow. Roommate told her no because I was a bit hurt that she didn’t come without an explanation and felt she was not cool of her to want to stay. I was more than willing to give her the benefit of the doubt, but I did not want her to stay with us without some type of explanation. Then she texts my roommate back saying she is not mad, but not everything revolves around me and that’s just me being me. It really hurt me as we planned and changed the date of my bridal shower so she could come because I love her and really wanted her to be there. Then doesn’t come, wants to stay at our home, and turns on me when she finds out that I’m a bit hurt.

On top of all of this, she is avoiding speaking to me because I think she feels guilty, but doesn’t want to admit it. Instead she puts my roommate in the middle of it and then says apologizes to my roommate that I put her (roommate) in the middle of it.

Why does it seem like all friends eventually turn on you? I would have never expected such a response from her and never knew she felt that way about me...