Why would a man tell you thins?

Yesterday I agreed to a non commitment relationship and asked him what he wanted. He said that I should avoid him or I will get hurt. I said thanks to my bad relationships in the past I won't get hurt. And I woke up to this this morning: I sleep around and I was unfaithful to all my exes. That's why I am single. Would love for us to remain friends, But I don't think I am the one you are looking for. You are young and beautiful and you deserve better.
Why would a man tell you thins?
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