How Do I get over it?

This is mostly a question for females but I will consider men's opinions too. I want to know if it's possible and how to get over the past with my boyfriend who has a huge history of being a womanizer. Obviously he's 53 years old, he's been with other women but the amount of women he's been with and having a notorious reputation for being a womanizer, is he ever going to grow out of it and could I be the last one?
How Do I get over it?
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