Why do so many people get lust cunfused with love?!??!??!??!?

im a teen ager and im 15 even i know the difrence.......love is when you care deeply about them.....i cant explain it youll just know when you feel it..........love is when you want to be with them for the rest of your life.....and looks dont matter to you though it does invove geting horny and having with them........but its not evrything to you all the point is you care and love them and always think about them.........lust is more like bn ully atracted to them whare you really dont love them and your lying teling them you love them when you really dont......you just think there hot and it gets the best of you and you only want them for like a week and then dump or cheat on them with another girl............thats so simpol to see the difrence!!!!! why do people get them cunfused?