I have a question

This is my first posting here and hopefully I am in the right place , first I am a divorced , bisexual who feel that one of my close friends is recently flirting with me , he is married but mention to me on several occasions that he is not happy with his wife and he is looking for a gf , he text me kisses and hearts and always ask me for sleeping over when his wife is not around , he mention that he has gay friends and go to gays club with them , he mention that he love anal penetration and he like to watch dicks when he watch porn movies, I was wondering how to tell him that I am bisexual and ready to be with him in indirect way or how to find out if he is bisexual in indirect way ?