One of the signs that people have chosen each other is that the girl is captured by the strong desire to build a nest, and the boy is captured by the strong desire to finally go out and betake oneself to new adventures. It is curious that these are girls who want relations to become “serious” as soon as possible – as if they seek to lose the boy’s attention. It can be a kind of instinct. But, please, don’t be in a hurry.