How should I react to hot and cold behavior?

He can go weeks being OK, then suddenly WHAM... he goes cold towards me and only me. When i ask if he's ok he provides a lame excuse... but he's fine with everyone else. So I take it personal and assume he has an issue with me. but there's nothing I've said or done that would provoke such coldness. It's as though he hates me at times 😕

What's the best way to respond to it?

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How should I react to hot and cold behavior?
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