Yeah one thing you should start your career life knowing young man is your co workers aren’t “your friends”. Let me tell you from a 3rd person perspective since your looking at it from a 1st. It’s a constant subconscious competition. They see a potential threat as they find it unfair that your starting off at 19 and they didn’t. By no means is 19 an hour a “life changing amount of money” and you didn’t commit a crime. The only crime would be opening up about your pay again and any other job. Nothing good will come out of it except gaslighting from co workers and boss. Your 17 and ambitious, your job is to LEARN your knowledge is what pays you more. I say keep your head down with the punches.