Is it appropriate for a friend to..?

Me, My friend and my boyfriend used to all work together. I no longer work there but they still do. In the last week my friend and I would make plans together and she kept flaking on me or saying she had to do something else instead. One time she said that she was going to work and actually just stayed home instead. Apparently she asked my boyfriend at work if he wanted to go out drinking with her and some friends later that night. I went to leave him a comment on the myspace website and right below mine were comments from her. She asked him again to go out , he said no so she said he was "lame" and just because he doesn't go out to the bars now because hes "married" doesn't mean that single people like her don't like to go out and still have fun. I'm not the jealous type but it struck me as odd that they had never hung out before, he was more a mutual friend through me and co-worker. She blew me off several times for whatever reason but insisted that he go out with her.

Is it appropriate for a friend to..?

Let her know that you aren't really confortable with your boyfiend going out drinking with her and the "single crew". He has already told her he doesn't want to (good for him) so she should just back off. It's cool if they want to be friends, and since they work together that's not weird...but she shouldn't be inviting him to go out with her when you aren't there.