I think it is very difficult to make someone like you again especially if you have done something very vile to make him hate you and breakup with you in the first place.
Nevertheless, here are some tips that will make your ex like you again.
First, you must apologize.
If you are at fault as to why you broke up, it is best that you make you feel that you are remorseful about what you have done.
This is the first step to forgiveness and eventually becoming friends again.
Secondly, you must be able to identify why you are doing this.
You must know why you want him like you again.
Is it because of the residual feelings that you have for him? On the other hand, do you just want to be liked by your ex so that you can say to other people that he likes you after all that had happened between the two of you? If the answer is yes to the second question then it is not worth to know if your ex still likes you, but if you answered yes to the first question, then we go to the third tip.
This is to work through the feelings that you have by confronting your ex and telling you the truth about your feelings for him.
This will clear all the air between the two of you and allow you to move forward whether together or apart.
As for the last tip, you must be able to make him see that you are worth liking again.
This can be done through changing parts of your personality that he did not like in the first place or moving to him that you will not do whatever it is that make you break up in the first place.