This is Psychlady. It sounds like you have really given him the benefits of the doubt and have given him several chances to clarify what he really wants. Your texts are clear and fair to him in every way. What you want is clear signals that allow you to have your wishes addressed and your questions answered. His reactions seem so inconsistent to his promises. You are reaching out to bring clarity to the situation and you deserve that. You have even given him a chance to move on without feeling guilty. I admire your patience.
As far as the relationship you already know that long distance relationship are very difficult for the reasons you are experiencing. Those long breaks in contact can wear a relationship down. The need for reassurance suffers as the breaks become greater and greater. Even resolution of problems becomes so difficult as you are not face to face.
You can accept your feelings that this is over without guilt and move on to find a more satisfying relationship that does not come with such heartache. This is one choice that gives you closure over hoping that it will get better. You can then move on a relationship that is mutually gratifying. Your other choice is remain in contact as friends or more and hope that he comes around. This however requires that you hang on without opening your heart to another more fulfilling relationship.
I would look to move on since he doesn't seem to be consistent. You can periodically text or not text at all but open your heart to someone who knows what they want.