I'm insecure about my dick size.. am I too small gays..?

I'm 18 and my penis is about 7-7.2 inches and this might sound silly to some people but im actually pretty insecure about my size. I've been told by a dude in the past I have a big dick but I just don't see it myself. My friend told me he has a 10 inch dick at the same age is me! And I cannot help but he jealous of him lmfao. But hes told me that when he has sex its not fun for him at all because he always has to watch out how much of his dick he puts in and always has to make sure his part doesn't get too much of it to the point it becomes painful. Idk but im still jealous ..

And does your dick still grow after 18? Minimum amount of inches i want my cock to be is 10 and maximum is 13. Im also African American if it matters.