how does one fall out of love?

if you really love someone,then you dont fall out of love,but you fall in love!Usually we fall in love and not out of it.I believe that once you fall in love,you cannot fall out of it!It is very difficult,especially when you love the person immensely.

various reasons to fall out of love - quarel and quarell, realising suddenly that we are made for each other, some body steels ur lover, lot of expectations and too much of possiveness, not allowed by people including ur near and dear

If you really love them then I don't think you can but you can fall out of love with someone if they treat you badly, eventually you begin to resent that person.

I think it can happen all of a sudden. I think the actual falling out of love probably happens slowly but realising what has happened is a sudden thing.Lots of things can cause this, the person changing in their appearance or attitude, their behaviour towards you, being unfaithful, maybe you yourself just want to meet other people, feeling trapped. Lots of things can make it happen.