Married male coworker confessed feelings for me—how should I respond?

He is married and I am a lesbian. We're friends outside of work but met at work, and he says he has noone else to trust with this. I told him it's ok for now but I'm not sure that the best way to handle this is to ignore it. What do I do?

Married male coworker confessed feelings for me—how should I respond?
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