I remember when I had a boyfriend like that (only my "boy" friend was 20 years older than I was!) and despaired of what to do as I loved him and yet knew it couldn't "go" anywhere. He "fixed" it by breaking up with me and I had no choice. It was extraordinarily painful until new/better things took his place. I think that's the only thing that can help? You have to cut him off and substitute trying new things until something else "grabs" you. The trick is to be able to keep the faith/have enough hope to get to the "next" thing.