My opinion in short - he doesn't want to deal with it at all and seeing how you aren't pinning him down he's quite ok with you being in limbo. Time to be direct, corner him and push the issue. If it means that much to you, you are going to have to risk the possibilities.
You're both avoiding the issue, just in different ways.
Best of luck
Playing the Game of Life with Monopoly rules.
Monogamy might just be in my genes
Poly Events All Over