Im 16, i should be dating right?

im 16 years old and a girl if you didnt know. ever since i've changed, like grown into puberty i dont care much for boys and relationships. but than when i see a happy couple or something like in movies or anywhere, where they look like their so happy and perfect i start to want that. but than when my sister tells me that a boy likes me i just say "so?" or "and?". or when a guy says he likes me like more than a friend like, i start thinking of ways to get out of the conversation or look for something like one of my girlfriends or my reletives. im always thinking "i dont need a boyfriend" and i tell my family and friends "i dont want a boyfriend, their to much hle and to much stress." and thats what i really think about relationships and stuff. and plus i have really high standards. some guys that my sister said liked me fit my standards but i just dont want anything. why???? i hate this. why do i always do this???? hlp???