Someone help

so there is this guy and girl i like. I liked them for a long time now and they dont know i like them. The guy is older than me by a year i don't know much about him and the girl i like is younger than be my a year i know her a lot. Also i am afraid of getting rejected by one of them i don't want to ruin my friendship. And they probably have someone, which makes me even more scared to ask them out. (⊙…⊙ )