Mate, there is nothing that really works to enlarge your penis permanently, not even surgery. Even with surgery all they do is snip the tendon that connects your penis to your body so that it looks bigger when flaccid and it might gain a smidge when erect.
Then they suck fat out of your *** and inject it into your penis.That fat is absorbed by the body, so you have to keep going back and having it done all the time.
Here are the questions you need to ask yourself.
Does my penis work normally?
Do I gain pleasure from it?
Can I get an orgasm?
Do I think I can make a partner get an orgasm, with or without the use of my penis?
Now think hard on that last one, because it is the important question, because sex is not all about the intercourse, it is about foreplay, and oral sex, and touch, and feelings, and what you say to your partner. If you make your partner have three orgasms without using your penis before you have intercourse, they won't care what size your penis is.
It is all about you being comfortable with you. You have to love who you are. You have to be confident with what you have and not be concerned that you are smaller, bigger, average or whatever.