How to let my wife know I love her?

I been away in investigations as I was a criminal investigator. I come home to find that my wife don’t think I love her. I had a couple of fake undercover relationships with people I had to put away. She heard in the streets that I was in love with this woman who I worked to put away. I don't know what to do. We agreed to have an open marriage because with me being gone nearly 90% of the time it wasn’t fair that she had to be home by herself. She even moved into a separate apartment.

How to let my wife know I love her?
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