Yes I lost a friend. about
3mo after I had my son, I joined a moms group and met someone I really clicked with. Mind you, I haven't really had any friends before this for a long time. It lasted about
5mo because she became angry with me that I cancelled coming over to her house because I was feeling very sensitive that day. My mom just told me that you will know who your real friends are. And she wasn't.
I have to agree that we tend to seclude ourselves because I never joined another moms group again. (I left the group because I wouldn't have felt comfortable being around her after that) I also just don't get out enough to meet new people. And it's sad to say, I've never had a friend since then and this happened a year and a half ago.