God is an all merciful God and it is His desire that ALL men be saved and that very well includes the people you would prefer not to talk to. Perhaps you have a neighbor who has seemingly spent his life trying to make you miserable. Are you to witness to him ? Definitely.
It may have to be done in a quiet manner where all you do is offer him kindness as he offers you arrogance.
That is not easy to do, friend, but it can be done. God has given us the power to go into the world to reach the lost and , my dear friend, there are many people we would consider unlovable in our eyes, but God considers them worthy of salvation and we are the tools He uses to carry the message of the gospel.
You have heard it said , " You may be the only Bible that they may see. " There is great truth to these words so choose wisely to obey the voice of God when He calls you to witness to someone, even if you don't particularly care for their demeanor. And He said, " Go into all the world, and preach the gospel to every creature. " Mark 16:15