you don't feel "tingly" about him, or perhaps he doesn't give you butterflies when he gets in from work anymore? Obviously it's situation dependent, but I think in general, women seem to change their mind in relationships on what could be considered a whim like this, and i'm not saying these feelings mean nothing but knowing you have to contend with these feelings that can change very randomely and at any time is kind of disconcerting. Obviously, having an "if it happens it happens" attitude about it is best. But women get wrapped up in situations, they are adventurous and love the chase. For instance, I would say a woman is much more likely to do something silly with feelings of sentimentality such as run back to a guy in a myspace/friendsreunited brief encounter. Then suddenly, you are back with mike from highschool, (your first kiss) and he's raising our kid. Yea, thanks love. paranoid?