crowd around	move to a particular place at the same time as a lot of other people
go together	if two or more things ..., they frequently exist together
go together	if two things ..., they seem good, natural or attractive in combination with each other
meet up	come together with someone, either unexpectedly or as planned
open up	talk more about your personal feelings and experiences \ open a locked door
pick on	keep treating someone or unfairly, especially by criticising them
sound out	try to find out someone's opinions, ideas, feelings etc by talking to them
take after	look or behave like an other relative
take to	begin to like someone or sth
take to	start doing sth as a habit