In Arabic, two different words are used for the meaning of I love you, one is used in the masculin form for male partners and the other in the feminin form for the female partner. You can use the word "Ana" which means "I" in front of both words if you wish thereby resulting in ( Ana Ohibuka) for a male partner or ( Ana Ohibuki) for a female partner.

But NOBODY uses classical Arabic all over the Arab world for everyday speech and hence translation of this sentence depends on the Arab country or cummunity it is supposed to be used in.
For example if you want to say this sentence to Syrians, Lebanese and Jordanians/Palestinians, it must read: Behebbak to a male and Behebbek to a female. In Egypt, Saudi Arabia and Iraq, slightly different versions are used. So to give an accurate answer, I would like to know from the asker the Arab country or community he intends to use this sentennce.

in Arabic script:
أهواك
or
أهواكِ

HTH
Mona