When you want the one you love to change for you，you need to change yourself first ！Only that is truly fair.

The sentence is neither grammatically correct, nor is it correct. Changing people? Ha!

The correct senetence could be, 'When you want the one that you love, to change for you，you need to change yourself first ！only then it is going to be fair for both !'

Correct answers are given by other people here. So, I would like to correct one more sentence, the one in the starting. You should add "if" after "me." Would you please tell me if the following sentence is right or not.

The correct senetence could be, 'When you want the one that you love, to change for you，you need to change yourself first ！only then it is going to be fair for both !'