つきあって

date, go out with, keep company with, accompany

→ 付き合う
つきあっ to date; to associate with + て Te-form (conjunctive form)
verb · informal Rare #31,045
date, go out with The casual hiragana spelling; often written 付き合って.
JA: 彼とつきあっている。
EN: I’m dating him.
keep company with, accompany The casual hiragana spelling; often written 付き合って.
JA: 買い物につきあってくれる?
EN: Will you come shopping with me?
Conjugation of 付き合う
Imperative
つきあって

ほんとにつきあってなかったのねあなたたち

So you two really weren’t dating.

— Love Letter (1995)

最初にデパートのバーゲンにつきあってほしいんだけど。

First, I'd like you to come with me to the department store sale.

その男とつきあってはいけないよ。

You shouldn't associate with that man.

彼とはお互い子供のときからつきあっている。

We've been together since we were both kids.