I am kind of worried that this type of thing will happen between me and a friend of mine. I've been sending her facebook messages and email messages at work quite frequently lately. I asked her if she minded and she said she likes the distraction at work. With my frequency of contacting her (which I "can't" help, with so little to do), I feel like I may be close to burning that bridge. I don't want that to happen because she's been a great source of comfort for me. She seems to not want to respond after work and largely on the weekends. Maybe it's just that she prefers the distraction at work.

I'm sorry you had to experience this with two friends. I know how important it is to feel like you have an ally IRL.