You are the only guy working remotely and you are surprised that you did not get "promoted" to manager? Are you kidding me? Of course he got the "promotion" be

You are the only guy working remotely and you are surprised that you did not get "promoted" to manager? Are you kidding me? Of course he got the "promotion" because he is on-site and he can do managerial work a lot smoothly than someone who is remote. Also, it's not really a promotion, it's a change in career. If you so much wanted to be a manager maybe you should go be a manager and not a developer. If you are worrying about the money then ask for a raise. If you are worrying about the fact that he is not managing you then quit.