A phrase that men use (often out of self pity) in an attempt to explain why a girl turned them down. The reality, however, is that he is simply not the girl's type & she is too nice to say so.
When you introduce friends that you've had for a long time to other friends you've had for a long time who have never met, but have lots in common and they become friends, it's a friend blend.
Maryellen knew Sarah and Barbara would hit it off, made a friend blend, and now we are all friends.