First off, I have a largish dick, about 7 inches long (my username is really stupid and i regret it, i couldn't think of anything else at the moment), and i never got to use it without paying for it. Sure, this overpaid fake sex has been better than having no experiences at all. But I never got learn how to make a girl cum. It was always my biggest fantasy and it didn't happen, I suspect it never will. Unlike most porn movies teach us, having a big penis doesn't mean that women will automatically cum for you.
It's probably nice having a big one compared to having a small or even an average one. Not meaning a huge one, like the ones in porn, that definitely comes with it's own problems, but a relatively big one. If for no other reason, then for the self-confidence it brings. However, that hardly matters if the rest of your life is fucked. Let's see, there are things such as health, intelligence, money, looks, weight, social skills that are all far more important than your penis size. Sure, i bet having a small dick sucks ass. But then again, if that's really a major issue to you, chances are you are exactly like me and never even got to use it much in the first place. In this case, you are just trying distract yourself from your real, much more complicated problems with this one.
If your life is actually okay in all other areas except when it comes to your penis size, then i have something to say that might actually be comforting to you. There are tons of men of all ages out there worrying over their penis size, many of them of average size just like you. There are much fewer women out there worrying about their vagina tightness in comparison. The conclusion? People tend to make the compatibility of the sex organs of sexual partners 100% the man's responsibility, when it's actually logically 50/50. The one and only bird-brained reason for this, is that no-one knows how tight your vagina is, except for the people who get to stick their dicks in there, because no-one can actually see the difference!
I'm not saying that women should get picked on because of their vagina tightness/lack of it. I'm saying that when talking about this issue between adults, those with the ability to see that 1+1 makes 2, can recognize that genital compatibility is actually a shared responsibility, and if there is a lack in that compatibility, then overcoming the issue in the bedroom is also a shared responsibility.