Dont do it to yourself or to him. Focus on you and what you feel like you need to do. Being..even talking to someone else is a unwise attempt to fill the hole you have in your heart. Focus on yourself and get yourself healed from this situation, and then you can make better decisions. Once you get thru this and heal from the pain it will be time to look into other relationships. No need to complicate your life or anyone else's at this point. One step at a time. A rebound relationship is what this has the potential to be and isn't fair to anyone involved. be honest and let him know whale you are flattered, that the timing isn't right for you. That you need to deal with the relationship you are letting go.