What You Have To Do If You Have Offended A Devotee Of The Lord.
Sacinandana Swami: If one has drunk the poison of offending a devotee, one should, with that same mouth, drink the life-giving nectar of sincerely praising (and serving) that devotee. Haridasa Thakura says, “If anyone offends a sadhu in a moment of delusion and madness, he must fall at the sadhu’s feet and bitterly repent; weeping with full contrition, he must beg for forgiveness. He should declare himself a fallen wretch in need of a Vaisnava’s grace. A sadhu is very merciful; his heart will soften and he will embrace the offender, thus exonerating [pardoning] him from his offenses.” (Hari-nama-cintamani, chapter 5)
In other words, if you have offended a Vaisnava, do not simply continue with your life as if nothing had happened. Turn around 180 degrees! Make up for your bad behavior. Repent, ask for forgiveness and offer some service. Be real, honestly, feel that your behavior was not good at all. A person cannot forgive you from the heart if they do not see that you have actually understood what had gone wrong. The river of forgiveness needs a certain slope in order to flow; this slope is understanding and admitting the mistake you have made.