Has anyone experienced this? And How can I overcome this issue?

I am in a relationship for almost 2 years. I don’t know what changed, but since last month I would get annoyed about the fact my girlfriend had an ex. Every time she would say something nice, my mind will go and say to myself. “Yeah right you said that to your ex”. Or If I see couples walking my mind will go “ she used to walk with her ex like that”

It’s just annoying and makes me distant from her. And sometimes it puts me into negative thoughts.

I would appreciate the help!

Has anyone experienced this? And How can I overcome this issue?
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