We hadn't even talked to each other two months ago.
We didn't know each other at all two months ago.
ーIt's hard to believe we hadn't even talked to each other two months ago, and now we're going out.
「2ヶ月前まで話したこともなかったのに、今付き合っているなんて信じられないよね」
We hadn't even talked to each other two months ago. で「2ヶ月前までお互いに話したことがなかった」
to go out で「付き合う」
ーIt's amazing to think we didn't know each other at all two months ago, and now we're dating.
「2ヶ月前まで互いの事を全然知らなかったのに、今付き合ってるなんて驚きだよね」
We didn't know each other at all two months ago. で「2ヶ月前は互いの事を全然知らなかった」
to date で「付き合う」
ご参考まで!