You should have tried to get a new job before you asked for the salary increase. Then if he didn't give it to you, you could take the new job. OR if you couldn'

You should have tried to get a new job before you asked for the salary increase. Then if he didn't give it to you, you could take the new job. OR if you couldn't find a job that paid what you thought you were worth, then you could just keep gaining valuable work experience.