annoying crush! help please!!

I have had this crazy crush on a family friend for like 3 years and I kinda think he is perfect! I don't really know what to do because he recently got a girlfriend and I feel like my heart is broken and I can't even sleep at night :(. to make it worse he got facebook and asked me to be a friend, I obviously accepted but know I can't go on fb because I will end up on his page! idk what to do!! any crush advice? TIA