It depends on what they did to you.
However, loving them could be the ideal thing to do. It may not be easy for you considering the depth of the offence; it you love them,
they will have a change of heart.
Remember, everyone has good side. By loving them, you would
be able to discover the sweet part of their lives and this can be
a great opportunity for you to excel beyond your widest endeavor.
Finally, please LOVE that person. God loves you remember.
I hope this little advice helps?