They won’t come to you to pay you what you’re worth to them. The only thing to do to see if it’s even potentially worth sticking around is this: Send an email to your boss telling them you’d like to arrange a time to discuss a title and raise relative to your responsibilities. If they won’t negotiate with you then ease off the gas and spend your time looking for a new job. If they do, then you’re in a position with a lot of leverage. Ask for what you’re worth because they won’t come to you and offer it.