[munimkazia]

From what I can make out, there is no reason why you shouldn't get paid more money. You don't owe this company anything.. If they are left with nobody, it is because they didn't keep their one developer happy. It doesn't look terrible. People leave their companies for better places to work all the time.

Ask for a big raise. Do your research and figure out your market value, and bring that number to the negotiations. If this doesn't work, start looking for another job, and leave till you find one.

If you think its unlikely that they will give you a raise (and you don't sound happy with your job anyway), just start looking for another job.