Why would he ask me about my future plans like if I plan on staying here long-term, where I want to live, and mention children?

[Anonymous]

[NoNameGuy123]

Don't look at is as him going too fast or already wanting children with you necessarily.

He probably just knows what he wants and is looking for a serious relationship, this is his way of vetting you to see if you're a potential long-term partner for him.

[Static_In_The_Attic]

He’s interviewing you to see if you are girlfriend/wife material.

[FilmGuy93]

He's trying to see if you and he agree about long term couple things.