Change. Is it possible?

How are you going to "make that change" if the "man in the mirror" won't look at you? What have you said to/about him that would make him want to ignore you. Is he ignoring you or talking to someone else about you, or has he found someone more interesting to talk to? Communication between the two of you sounds crazy right? The decisions that you will make will affect the both of you so both of you should be making them. Whenever a one-sided decision is made the outcome isn't forseen thus it may not have been the right one. But again the two of you won't know whether or not because it was one-sided. Each of you figured the other would deal with it whatever the result. This causes conflict and both of you feel it but are too busy trying to mask it by making more bad decisions. Don't walk away until he at least acknowledges you're trying to get his attention.