any advice??

An

so ive never really had many friends and i really only hang out with my best friend so theres just 2 if us. but everytime i talk to someome new i feel like they domt wanna be friemds w me so it makes me overthink everything. im usually pretty shy and its making me feel even worse about myself that no one really wants to talk to me. also my bff and i have been friends for almost 5 years and she is never truly happy for me and gets jealous when i hang out with one of my other friends. anyone have some tips on what to do?