Hello Daniel, I would say this: "My goddess, maybe we need to learn more about each other."

“Maybe we need to know much more About each other” is correct. Daniel, I hope it helps :)

Unfair to Goddesses, but we only say 'My God' as an expression :) "My God, maybe we need to know much more about each other." ('about' needs to replace 'with') Be careful with the usage of 'My God' - not that many use it.

I can only guess, what you want to say here. Goddess means deity, female god like Freya, Demeter.... For the second part you could say: We should get to know each other better... Maybe this helps. Also, maybe you could provide context: where did you find this sentence/ how do you want to use it?