go with

go with (someone or something)

to depart in the company of someone or a group. Jim's not here. He went with the last busload. I'm leaving now. Do you want to go with?

go with someone and go steady with someone

to have a romantic relationship with someone. (Go steady is dated.) Sally has been going with Mark for two months now. He wants to go steady with her. He doesn't want her to see other guys.

go with something 

1. Lit. to accompany something agreeably. Milk doesn't go with grapefruit. Pink doesn't go with orange.

2. Fig. to choose something (over something else). I think I'll go with the yellow one. We decided to go with the oak table rather than the walnut one.