How long ago did his marriage end? Did he get with you quickly after? If yes, you may just be a rebound. If he is emotionally unavailable then this is going nowhere. I would walk away tbh. I would have walked away 5 months ago. You know he has a fear of commitment because of the past and that is something he needs to deal with on his own. You cant "fix" him so its really unproductive to try and you will just get hurt.
He needs to get over the past and be more positive when it comes to love in order to have a healthy successful relationship. It has been ten months and that still has not happened. How much more time are you going to waste?
He is right that it takes a long time to truly fall in love. In the first 6-12 months, you are infatuated by each other with all those crazy feelings and butterflies and lust. Love comes after that period when you really get to know the real person and take off your rose tinted glasses. When you know what all his strengths and weaknesses are and all his annoying habits but you love him anyway. But most people do say I love you during the infatuation stage and there is nothing wrong with that.
You need to talk to him. Ask him what is going on his head about the past, present and future. Ask him to be honest and don't get mad and upset if he doesn't tell you what you want to hear. If you dont get the answers you are hoping for then it is time to walk away. And you do need to ask him if he believes in love or not and if he will ever truly love
"Don't ask a question if you can't handle the answer".