YOU SAID:
I don't know if he could love me.
INTO JAPANESE
彼が私を愛することができるかどうかはわかりません。
BACK INTO ENGLISH
I do not know if he can love me.
INTO JAPANESE
彼が私を愛することができるかどうかは分かりません。
BACK INTO ENGLISH
I do not know if he can love me.
That didn't even make that much sense in English.