"How can you claim to love a person & walk away without a second thought!!!???!!! "

This question of yours is a good one, but unfortunately people do this, and it sounds like he has done this to you. As you have described that you feel the urge to tell him how you feel, - he may not be willing to listen to you. Perhaps you could write it in a letter (then decide what to do with that letter) - at least it might help you express what you feel and think?