I'm so tired now. What should I do?

I've been married for 13-14 years. We have a son. This is actually a confession. But I don't love my wife anymore. Our sex life was already terrible (due to his distant/cold nature). But my love is gone, too. :( I love my son very much and want to be together forever, but it's so hard when I don't love my wife. I'm getting tired. I'm tired of always pretending :(

I'm so tired now. What should I do?
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