How to say "I should be your girlfriend" in Japanese?
私が貴方の彼女になるべきよ
(わたしがあなたのかのじょになるべきよ/
watashi ga anatano kanojo ni narubekiyo)
Meaning
I should be your girlfriend
Example
私が貴方の彼女になるべきだわ (dawa)
I should be your girlfriend right? 私が貴方の彼女になるつもり (tsumori)
I am going to be your girlfriend
(わたしがあなたのかのじょになるべきよ/
watashi ga anatano kanojo ni narubekiyo)
Meaning
I should be your girlfriend
Example
私が貴方の彼女になるべきだわ (dawa)
こうするべきだわ (kou suru beki dawa)
I should do it like this
I should be your girlfriend right? 私が貴方の彼女になるつもり (tsumori)
I am going to be your girlfriend

