Why is my husband still friends with a woman who is in love with him?

This woman is in love with him but he still remains friends with her and goes out with her. Why would a man do this? He denies being in love with her and told me he just sees her as a friend. Does he secretly have feelings for her too? I’m not talking about an affair, I just mean does he care about her more than he is telling me, like does he emotionally care for her if he is doing this? I’m not talking about affair, just the emotional side of things?