I understand what your saying and understand how you feel.
I was just on AIM and my best friend lives in NC, and has for about the last 10 years, we have been best friends since the 8th grade. Now she is working mid nights so she is online in the afternoons and we can chat, Today we were remanissing (sp) about OLD stuff, I was cracking up.. it is amazing how when you connect with someone, no matter how many miles, or days go by you can pick right up where you left off.
I hope in your letter you let her know how you felt,and how you hurt because of this distance, ( I'm sure you did, you write as you feel. I can tell) She probably was busy and overwhelmed with her new man, as some woman do, I'm sure she'll realize how you feel and get back to you. It is like a love relationship,and it does take work and effort to remain in touch and close. There are times I think about now calling someone,or not returning that email, But I usually always do,and I'm glad I did, usually on the phone, we talk too long,and I end the call much happier than before I called.
I'm sure you'll work it out with her, and you'll be at her wedding. You guys sound too close to not.