Are Minnie and Mickey Mouse dating?

Are they siblings? What's going on with these mice. There seems to be a vibe between them but I can't tell if they're just close pals or even related. I haven't read a bedtime story in which they're romantic (haha I can't believe I'm writing that) but they do hang out all the time!! In related queries, are they 4 years old or 40. Discuss.