How can I stop falling in love?

I am 16 girl. I fall in love VERY fast. I love tons of crushes and i cant help it. I get my expectations so high and start day dreaming. I know for a fact that he will never be mine, but my heart wont accept it. I get my heart broken so many times and i am tried of it and myself. I am just REALLY Lonely and just want someone. I love it when guys are funny; all of my sorrows, pains, tears just banish away and i am happy when i am around some. Some, iv never even met but know of; i cant stop thinking about him. I just want to STOP FALLING IN LOVE.I am 16 and i should be focusing on school and trying to get into a good college. My parents are really strict and would never accept anyone.