The Universe you live in will find its own way of dealing with such a powerful wish you made by ripping itself apart or imploding back into singularity at a speed many times faster than light as soon as we discover the truth about dark matter. When the realization does come rearing its head, either the temperature of space reaches absolute zero K meaning you will not even be able to move at all, or your godlike durability cannot even handle near infinite degrees K, effectively disintegrating you. If that's not enough, then perhaps any black hole you run into would swallow you whole without mercy, spaghettifying you.
Your wish is rendered null and void. Sorry, buddy.
I then steal your wish and say I want to make people's lives happier and cheerful. <3