I think im jelous...?

ok wel theres diz boy that ever since the 1st day of school he be tryin 2 go out with me but i always told him i liked someone else..wel then we kept on talkin 2 each other & idk if i started likin him or i juzt liked bein with him & talkin 2 him..u kno hes a nice guy..wel i dont tink i like him but now he b hanging around with ma ex best friend (sum ***** datz lik my enemy now) & doesnt realy talk 2 me no more...he stil says hi 2 me & all but not how he use 2...& i cant stand seein them together...idk if im jelous or not but wat can i do 2 get this jelousy feelin away?