I can understand how you feel. It’s difficult to invest in someone that you don’t feel is completely invested in you. But talking to him about your relationships can’t help. What would be his reason for coming back. Because he just can’t stand the thought of you being with someone else? You can stay mysterious about your activities and keep him guessing what you are doing without giving him all the gory details. I just don’t want you to do something that is counter productive to your goal. Enjoy the time you have together and keep working at it. The time that you are apart, be as elusive as he is. It can’t hurt.