WAIT.
He’s three years older and I know that doesn’t sound like a huge age difference, but when you’re 16 and he’s 19 that is an astronomical difference in maturity and the stages of your lives.
Don’t rush into it because you’re horny and he’s older so you think you have an obligation to catch up to him. If it’s what you want, then, of course, do what you want. But you’re here asking me if it’s the right thing to do. Which means you are having doubts.
I don’t know exactly what your doubts are, but you should think about that. Figure out the real reason why you’re hesitating to take this step and you’ll get your answer about what to do.
Sumptuous Daydreams 