For me, it wasn't really one moment, but a series of moments. I knew that DH was the one for me when he was ok with me being me...sounds stupid but for a few years before we met, I kept trying to fit into a mold to be with the guys that I dated, and I felt like something was inherently wrong with me when I just didn't fit! Early on in our relationship, DH invited me over to his place and made me a "no-reason cake" - we decorated it with all this crazy icing and gummy bears, lit some candles and took some pictures. It was so goofy but we still do it now every once in awhile! Also early on, I had a health scare and was pretty shook up. He called me and asked me to get dressed up for dinner as he was taking me to the Calgary Tower. I'd never been there and was really excited. As we were sitting there in the revolving restaurant, we just looked into each other's eyes and all of a sudden he said "aww! You are going to fall in love with me!!" And I totally did
Sounds cheesy but it was totally a moment where I was like, "yup buddy, hook, line and sinker!"