What’s the value of a vote? In a presidential election, practically zero. Your vote has virtually no chance of impacting the outcome. That’s one reason I don’t feel bad about not voting.
The corollary to this fact is that since no one’s vote is likely to affect the outcome, there is no reason to be upset about anyone’s voting intentions. If your co-worker’s or relative’s vote for a candidate you dislike had virtually no impact on the election, then there’s no reason to feel resentful towards them because of how they vote.
If you really embrace this logic, then you ought to be more friendly and charitable towards people whose politics you dislike because their vote has no impact on you personally.