Hi! Well, I will tell you how things seem to happen for me - doesn't mean it happens the same way for everybody, but it's just my own experience.
I met my last girlfriend, whom I went out with for about 2 years through a band that I was in. She was one of the singers. We were in the band together for about a year before we both said to each other that we'd like to get to know each other better. We used to laugh and joke around a lot. I was definitely the flirt of the band and I was the newest member. I always laughed and teased the girls a lot, so they definitely liked me. But, I never really knew anything was ever going to come out of it. I was just being myself. Until that one day, when she said to me she would like to get to know me better. My whole world turned upside down at that moment. I heard and felt myself telling her that I would like to get to know her better too.
However, after she said that to me, things were totally different. I became totally self-conscious, and was nervous around her all the time. I found myself being silent more often with her, because I didn't want to say something stupid and screw things up. I always was wondering what she was thinking and was worried about what to say to her. Also, I wondered where to take her on dates, what her likes were, and what to do to continue to please her. I also found myself making stupid jokes out of nervousness and found myself more edgy. She, of course, thought I was cute because I was nervous around her, since the relationship had changed, which caused me to be all the more nervous, because she was all up on me at band all the time. I couldn't think or concentrate on anything we were doing at band most of the time, because all I could think about was her and how she made me feel - physically and mentally. We have not been seeing each other for the last year, but that's still how I feel with her. There are other girls that I have dated that I have not felt this way with, but I think you just know when someone sparks something inside of you. You feel it with your whole body and soul sometimes. At any rate, that was just an experience of mine. I tend to fall for women that make me feel that way. Thought I would share!