Did anyone else feel like this?

When I first got in to a relationship with my now fiancé I knew he ticked pretty much every one of my 'boxes'... Good job, responsible, kind, honest, handsome and 6'1" (yes I have a thing about height) 
Anyway, I had been in some bad long term relationships in the past and had been single for around 8 months. I had up until I met my fiancé been enjoying single life. I wasn't discounting settling down but knew if did it would have to be with the right person. 
He did everything right from day one and after a few amazing dates he was keen to make it official. I was quite taken back that everything had clicked into place so quickly but also a bit weary of getting into a relationship. I felt a bit down for a while thinking I was doing the wrong thing as I didn't want to mess him about if I wasn't 100 percent into it. The problem was I didn't know why I wasn't sure. I guess now I was just afraid of getting attached and it going pear shaped again after introducing him to my family etc. Anyway I'm so glad we did get in to it and I'm the happiest I've ever been. He's given me no reason to regret giving up my single life and he treats me amazingly. We just got engaged and also found out we are expecting. I was thinking to myself how lucky I am right now and how much my life has changed. So glad I took a chance! 
I'm just thinking how weird it was that I was so weary in the beginning! Anyone else felt something similar or am I just a bit odd? Lol