So today i went out what was originally planed with a girl 1 on 1 date but it turned into a group of 6 people in total joining us.

Basically i could not start or keep a conversation for some reason, everyone seemed to get along except me.

I went full autistic, shut myself and stoped talking.

Ruined everyone's mood the girl was wondering what was wrong with me,after that she started fully ignoring me.

I got butthurt, and for rest of the night just kept shut and walked behind them until we went home.

TLDR; how do u keep, start or do conversations that are more then 1 person.

Apology English is not my first language.