Can a person change?

My guy is a charmer and always has been especially with the ladies. We have been friends for years but i never wanted to be involved with him cause i felt he had too many female "friends". Well now he is 53 and way more laid back and i don't see all the red flags i used to so i got into a relationship with him. Now im starting to see that he DOES have lots of female friends and is always so helpful and caring about them Or their needs. Am i being immature and looking too much into it and can a once player ever really settle down?
Can a person change?
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