He hasn't found the right girl to fix him yet, but cat-lover may be the one to change him to girls! Not only is she that cute, but she won't even mind him "dating" his friend until they all graduate. Heck, she'll even watch and cheer them on!
ObHeadCanon: She wants MC so much because she's a closet yaoi mangaka. So if he said he was gay, she'd go "Oh, yeah you are! Hold that pose!" so he can't win.