Did you have a moment of epiphany that your FH/FW was The One? Or did you realize it when someone popped the question? Did you feel it when you first met/on the first date?
For me I realized it about 2 months into dating. I went home for Christmas and it was the first time I missed an S/O for the 2 weeks I was gone. I did a LD with an ex for 4 months because of a summer job placement and there were times where I missed him, but with my FH it was a different feeling - I imagined us together for Christmases in the future when we'd have kids around the tree. I remember crying with my mom on Christmas Eve and telling her even though I just started dating this guy, I felt like he was The One. I told her I felt like I was supposed to meet him and end up with him.
Bonus: For anyone who popped the question, how'd did you know it was time to ask your S/O to spend the rest of their life with you? Did you have a plan for the proposal or did you wing it?