They have suction pumps that will definitely work. Perhaps not for everyone, but they do work from a little to a lot considering your vein structure in your penis. When you expand your blood vessels in your penis via a partner giving you oral please it increases your penis size during the act. What a penis pump does is expand the penis much more so that your blood vessels get "trained" into becoming larger, thus the penis compensates by growing more girth and length to accommodate the blood vessels. Don't take pills, they'll ultimately mess with your liver and/or kidneys and you can't take those forever. You can buy a pump, use it 3/4 times a year for as long as you like and it will increase your size. There are also surgeries but they mainly center around girth and you'd want to wait until your older anyhow. Just a bit of advice, become a most excellent server of oral pleasure for your partner as well as explore the anal aspect of humanity...you'll be surprised at the outcome. Good luck (from a guy that's been around for a while)

I'd strongly recommend against a vacuum penis enlarger. Very few manufacturers are not facing class-action lawsuits. There is no evidence that they improve circulation in the penis. Most of the analysis of growth from pump has shown swelling and scar-tissue rather than any change of dimension of the Corpus Cavernosa.

Surgery can give you small increases to size but at a high risk.

I think it's probably just fine to accept that you have an average-to-slightly-below-average penis. You have enough length to reach any relevant point of a woman needed to pleasure her. Unless you have ambitions of working in porn you have all the tools you need to be a great lover.