Could you seriously go through life with no close friends and be happy/stable?

Perhaps, you have a SO and family, but, no close friends. Maybe, your sig is your best friend?

I travel with a bunch of teachers to Windsor (Ontario) for night school. Tonight, it was just this one teacher and I (as we decided to attend an evening seminar. ‘Twas optional). Anyhow, the woman whom I was driving with said to me that she has social anxiety disorder and went onto tell me all about it. She also said that she’d be perfectly content on having no close friendships (except for husband).

Is this even healthy?