anyone out there dumbfounded that they got married?

Yup.

I did not believe in the institution of marriage. Was engaged (peer pressure) once but never saw the need for marriage. never started planning a wedding even then (engagement lasted less than a year)

Roll on present situation. I met my SO years ago, we were friend for years . Somehow I knew he was the one for me, yet timing was not right. When I went to see him (across the world) and.......fill in hugely emotional scene........my boss got wind of what on earth was happening (I was one of his most trusted senior managers, not really the emotional type) he pulled me into a meeting room and said 'what are you doing. You hardly know this man' and I looked at him and I said 'you don't understand this is the man I am going to marry' I remember thinking 'MissE you are nuts, you did not just say that'

My boss however looked at me and he said 'well this changes things a lot. Go and good luck You deserve to be happy'. My then boss believes in these things as this was what he felt when he met his wife and is happily married (nigh on 30 years).

A year after this episode I proposed to my SO and a year after that we are getting married. Never been so sure in my life and yet still think never thought I would be in this position.

its not nuts! you obviously were not completely single if you said it was a long term relationship.. go with the flow girl.. if you are happy dont question it.

Hmmm, have you considered therapy for your problem? I mean it doesn't seem like you're too happy with your decision and are having doubts.