Am I not good enough if my boyfriend says he's not possessive about me but was possesisve in his former relationships?

My boyfriend told me in a random conversation he was extremely possessive in all his previous relationships but not with me. I didn't know what to think about it. Am I overthinking or is there anything?

Am I not good enough if my boyfriend says he's not possessive about me but was possesisve in his former relationships?
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