You've done nothing wrong by returning to work.
Some awkwardness is a risk of workplace romance, if you can handle it, everything is fine.
If he can't deal with it, that's his problem.
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If your success is defined as being well adjusted to injustice and well adapted to indifference, then we don?t want successful leaders. We want great leaders- who are unbought, unbound, unafraid, and unintimidated to tell the truth.