「大好きだと言った返事が思ったのと違ってもそれだけで嫌いになんてなれやしなかった」 "even if your reply when i say i love you is different than what i expected this can't make me hate you" would be the translation. 「嫌いになんてなれない」 would be translated "i can't hate you" but it would mean more like "if only i can hate you... i would but i can't" 「嫌いになんてなれない」 is said when the person wants to hate someone but he/she can't because he/she still have feelings for that someone. hope this helped :)