<human>: Can you provide a brief rundown of the text in within 3 sentences?

So I'm an 18 year old male and my friend is also 18 years old and is female. Now let me just give you a little background of our friendship...
We were friends for quite a while but we never got close until our senior year in high school when we both had classes with each other and we both got out of that "seemingly awkward adolescent stage". 

Anyway, we would talk/text/chat to each other almost everyday, did a lot of things together as well, you know best friend stuff to say the least. Also, let's call my friend Rachel.

Now we're both in college and we go to the same university and out of no where she has stopped talking to me. I also did meet a girl whom I really like as well this first year in college and I don't know if that has anything to do with it because I always figured Rachel and I would always be the best of friends but I guess I was wrong.
Another thing that could be taken into account was the fact that she doesn't like one of my male friends whom I am really close to as well. I don't know if this has anything to do with her doing this to me either.

During our winter break I tried messaging her on Facebook, texting her, etc and to no avail. I was completely ignored and she never replied or texted after. When our break was over, I noticed she seemed to avoid me in the hallways, where we normally sit together, and ignore me in general (we also have a class together).
I don't really know what I should do as I have messaged her saying," I was sorry for whatever I did and she probably does have a reason to ignore me and I'll understand if she doesn't reply." I feel like I went terribly wrong on that part.
<bot>: One of my best friends recently stopped talking to me and began ignoring me as well. I have listed possible causes but I just don't know why still.