strangest thing happening

So I have the most beautiful life, I have a wonderful family and the best partner with whom I live.
When I joined SCS 1 year ago I had doubts about my partner. I recently, meaning 2 months ago, realized that I can’t live without him. I really I’m so lucky to be loved by him and today I noticed how I was suddenly sad and also a bit annoyed. And I asked myself what was happening. But I couldn’t tell why. SO I suddenly started to imagine how I doubt my relationship and started to go back and telling myself the story about how he’s not enough and I’m not fully into him etc. And that got me sadder and now I’m at the point where I just want to sleep and don’t want to talk to anyone. I can’t get myself to not let my get down by this feeling. I’m not trying to get rid of it. Just to not entertain or strengthen that feeling and story. Can you help me with that?