He said he doesn't want a relationship?

He has told me he was not looking for anything , he doesn't want anything and then 2 months later, I found out that he's dating his female friend who recently broke up with his friend (she was the girlfriend).

We never had sex and I felt he had feelings for me but he said he wasn't looking for anything.
Then how come he starter dating this girl who was his friends girlfriend?

He said he doesn't want a relationship?
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