What is love????

What is love?? is it when you love someone but they don't love you but they say they do but they don't is it when your heart is sip a beat ever time you are around him?? but you wont to just say hey i love you and do you have a girl Friend but that is to hard so you sit on your bed and cry becuse you cant be whit that one boy becuse he don't love you or he has a girl Friend or he don't like girl so you just cry is that what love is????