sorry but it's not right. What everyone else is saying is right, there is a huge difference in 4 years. I'm 20 and I can say I have changed a lot in 4 years, in certainly not the same person I was. yes you may think you are mature for your age, but so does every other teenager, even I did at 16. ultimately, you just need to be safe and make sure you don't take advantage of and stand up for yourself.