What should i do ..i am in extra martial affair..and in love with my bf deeply?

am married 2 years back......i have a 1 year old daughter also.........jst i month back im deeply in love wth my hubby's frend.....i discovered him as a source of immense happiness.......he has become my reason to stay happy.......at the samtime i also have respect for my husband...........i cannt ignore his emotions and sentiment............im love him care 4 him...cant let him go down......bt i knw he is very conservative and possessive and will leave me if he comes to know about my illicit relationship........ and at the same time i cant leave my boyfrend..........he has become my best frend.......wth whome i am free to discuss everything........wth whome i can share everything.......wht sud i do???i knw im very confused.....bt still positive abt everything that comes my way.........