Very tough situation for you because there is no guarantee one way or the other. If you leave now, you will never know and if you stay and nothing changes you believe you have wasted a year of your life. While only you can make this choice now, my gut feels like it would be premature to leave now when he is still unsure. That may never change but I think if you leave you will always wonder...so I would live in the moment, enjoy your connection and love for one another and let it play out as it will. It is not wasted time because all of us only have right now so live that right now.