You don't get what your skills are worth. You don't get what your responsibilities are worth. You get what you can negotiate. This is the most important lesson about salary.

Your negotiating position is stronger because you're difficult to replace and weaker because the comparable for your salary is your hourly wage. Your bosses have had the milk for nearly free; any price for the cow is going to look expensive by comparison. (For example, if you're currently working for $10/hr and step up to $60k -- which is aggressive but, hey, key employees should be aggressive -- that would cost them on the order of five times more, when factoring in taxes and benefits.)

Oh yeah, benefits. You're 19, so you may not get the importance of this now, but professional white-collar workers either a) get them or b) have an hourly many times what you're making right now so that they can buy them for themselves. Typically this includes healthcare, some retirement option with employer match, paid vacation, and such other perks as may be standard or negotiated.