Awww Val, I'm so sorry you're feeling down. I have had a similar experience. I was best friends with this girl named Val (I know Ironic) since the 4th grade all the way through college. She had a crush on my cousins (mom's sisters son(). So I introduced them and within a year they were dating. But I noticed when I went to college we started drifting apart. I didn't even know they were dating because the relationship between me and my cousin was aweful at that point so she hadn't told me they were dating. She just stopped responding to my messages. He had basically made her choose between me and him and she chose him. It was aweful. I still cry when I think about it because we had a long friendship. She was my other half. We were joined at the hip, our parents were each others and ect. I didn't even know when she was engaged and she didn't tell me or invite to her wedding either. I found out through mutual acquantences. Even when she would see me, when she was away from him she would say hi and just run away. It was so hurtful to me but now when I think about her, I wish her nothing but the best. I hope she is happy in her life, even if it means it's without me.
I know it's not the same situation as yours, and it's a bit more drastic but it's somewhat similar and I just wanted you to know you're not alone. We have all been in those situations with friends. I miss her everyday but she made a choice and stuck with it and I have to respect that. Hopefully your friends email will explain more, or maybe you guys can buy calling cards and talk to each other. I know sometimes when new relationships start, it's hard to tear away to make time for old friends. That has been my problem lately. I have this great new guy whom I'm so in love with, but we spend all of our spare time together. I at least still call all of my friends regularly, I just don't seem them as often as I used to. I hope this helped a little
Hugs coming out to you from me and Coco