The best way to make friends as an adult is to find a hobby. Like you said, when you go out to social settings, you have to talk. If you engage in a hobby, such as soccer, you're socializing without having to talk. Think about some hobbies where you can socialize without having to talk a lot. If you want advice, stop ignoring it and acting hopelessly. You say you don't need friends but obviously you do, everyone does. Having a stutter isn't your fault, but it is your responsibility, so stop blaming everything on it and do something about it. Otherwise, you're going to stay miserable. The first step in getting what you want is taking ownership of your problems.