best friends boyfriend.....

so my best friends boyfriend and i talk more than my best friend and i but before they dated i met him on instagram and we talked for about 2-3 weeks and i told my best friend about him and showed her his insta page and then they start to date.... so i feel awkward talking to him but i still really like him and she comes to me with relationship advice and a MAJOR part of me is jealous but i feel bad and she knows i still like him but she also tells me about them having sex....Is this wrong that i still feel the way i do???