There is no specif time it all depends on if you find "the one"

To know if the other is ready for the long-term relationship by communicating with them...don't assume a damn thing. If they are not ready they are not "the one" and move on to the next one. On the other hand, you can always keep having fun with them until you find "the one" :)

"We cannot control the negative atmosphere of the world, but we can control the atmosphere of our minds"