if you're asking how do you tell your b/f what's really going on inside your head, what's happened to cause your eating probs etc....if you really want him to know but just can't go there face to face...why not try writing it all down? if you still don't feel comfortable handing it to him then mail it. i always tell people that's the best thing to do even with parents, doctors, T's etc....if you can't say it then write it, if you can't hand it over then mail it.

hope this helps, sorry if not...good luck to you getting the help you need.