What do i do!? please i need advice?

ok sso ive been dating my bf for a little ove r amonth and he has this best firned shes a girl and yea i have my guy friends but not like those two. and there only friends because she has a bf sh ehas been dating for over 6 months. I have nvr been a jelous person untill now. An just the other day he had to put off our lunch plans cuz he promised her he would go to bio detention with her... so i was a loner...what shold i do to get rid of my jelousy issues??? should i talk to him about it... but i dnt wana bicker idk plee!!!!!! help!