I am so sorry you're in this situation.

I learned the hard way not to trust co-workers. The day my husbands grandfather passed away, a lady I had been "friends" with for years at work and I were talking on break, I was crying and waiting for my husband to pick me up so we could go to the family gathering b/c of grandpa's death... this lady turned around, looked me dead in the eye and told me she didn't want anything more to do with me and wouldn't be speaking to me again. Just like that. Poof. Friendship of many years over. She still doesn't speak to me, not even a "good morning" while passing in the corridor.

I've had to learn that we don't go to work to have friends, just to work. It's an awful way to do things, since we really do spend the majority of our day with these people.