Argh!! Advice needed... before i go CrAzY!!!!! ugh?

Ok.... its the famous love... square kinda... i have a crush on a boy who likes to talk to me about my best friend (he likes her, he told me) but my best friend likes this other guy who likes her back (he used to be my best guy-bestfriend) and i actually had a crush on him too... see heres the problem... im kinda like CUPID... unfortunately... my best friend's boyfriend talked to me at the beginning of the year asking me how he could ask her out... and i actually HELPED him even though i really liked him!! so now they are happy and im REALLY not... this happened again with another guy (i didnt like this one) he was telling me how jealous he is cuz he loves my best friend... and finally i kinda brushed it off and ignored it cuz i really really really liked this one guy (i had always liked him but always felt he was out of my league) and so far it seemed like he liked me too. But then one day it happened again... he confessed that he had a HUGE crush on my best friend and he was in love