What is Love?

Can someone define wat is Love? What does it really mean? And y is there love? I think to love is to give unconditional sacrifices and time to someone, and to love is to change the someone for the better but not to what u want, and to love is to see him as he/she is now not what he/she was... (pls feel free to add...)

I've a frend whom have just broken up with her bf of 18mths, and the reason that the bf gave was simply ridiculas and dumb! He said he has lost feelings for her, and also said that he feels that she's just too good for him and that he cannot give her the life and future that she deserves... what crap man... if so den me and my DD wldn't have lasted 78mths man! (Today is our 78th mth anniversary)