People pose as gods. These are typically high powered sorcerers or wizards. For the common folk, they see no difference between their acts and miracles, and for everyone else, they're too scared to reject their status.
Actual gods are only considered with the totality of the dimension and even multiple planes of existance. They simply cannot concern themselves with the affairs of mortals, unless if they find one they like for some reason.
Humans can become gods but at risk of losing their... humanity. Whatever desires or personality you had before becomes spread as thin as the cosmos.