Why is my friend all of a sudden ignoring me?

All i can say is that its not worth it. I had something like this happen to me with someone last year. We were getting so close and all of a sudden she stopped talking to me. The only difference is that i had NO CLUE as to why she changed. Like your friend she started ignoring me. Even when i was at her house (i was there cuz my hubby was cousin to her bf so he had a reason to go too) she would not even greet me if i showed up. It was confusing! I texted her one time "hey.... how have you been, ever since you moved to your new house you never talk to me anymore. Did i do something wrong?" her response- "sorry i have just been really busy". We kept texting but i noticed she was very short with her responses. After these texts i realized she just didnt want to be friends anymore for who knows WHAT reason, because her bf had brought up to me and my husband that she was always hanging out with other friends... so she wasnt busy enough. So after that i decided... why should I be the one reaching out to her when SHES the one that decided she has no time for me? That text message is all i needed. I didnt confront her about it because i figured thats what she wanted and i sure as hell didnt want to look desperate. I never confronted her about it nor did she ever tell me why she changed. It could be so many things. In the end (sorry so long) a friend who cant give you an explanation is not worth it. Because if you are being a good faithful friend to someone and they can just do that to you then they are not good people to deal with anyways. And to be honest i dont understand how they have ANY friends. Just think, if someone truely values your friendship... dont you think they would be mature enough to let you know whats bothering them?