Need an advice

I met my boyfriend in a dating app for gay name Meet Market. He is from USA and i'm from Viet Nam. Tomorrow he told me that he is going to marry a girl cause he is Bi and cause we live so far for meeting and come over. The uncomfortable thing is after that he ask me to wait for him cause 2 week later he will come to VN for business and he want to meet me, date with me to decide who he will live with, his wife or me. I love him but that thing is so wrong! What I need to do :(