The people that replied here could be right - he tells you that he loves you to keep you around.
There might be other reasons:
You say he just came out as bi? He definitely has issues accepting his sexuality. Most "bi" cases are a transition phase for closeted gay guys and a "relationship" with a dude would be admitting to himself that he is indeed gay and he just wont do that to himself.
Another option is that what he is saying it's the truth. I have been in love with this guy for years. He with me. We are not in a relationship. We don't believe in relationships. We are best friends, we had sex, we share everything, and we are free. I have moved to another country but to this day I love him.