how do you know?

how do you know when your in love? is it when your heart skips a beat every time you see that special some one or is it when the only thing you think about is make long passionate love with the special some one?

I may not be able to give you the right answer but
usually when your inlove and you ask yourself why do you love this person the one correct answer will be i dont know i just do love him or her

you know you love the person when all you can think about is them and you dont look at their disadvantages.. nobody is perfect.. everyone has their own little disadvantages. cant really explain it, but i tried :)
like Sarah said: "YOU JUST KNOW!" :)