- Confess it to God, because he equates hatred with murder, and repent of it.
- Forgive them of the wrong they have done you. Prayerfully ask God for help.
- Ask him to give you love for that person.
- Be friendly. No, not fake chatterbox friendly, but say "Hello", make an occasional comment in passing &c.
- Look for an opportunity to do a bit of good for that person, some small favor. Even if they do not know it, God knows and it is also good for your own spirit.
- Pray for them.
- Take your time. You may never become great pals, but you could become friendly acquaintances.
Still love me?