25 year old woman dating 40 something year old man?

I’m very interested in this 40 something year old man. He’s in his early 40’s. I know he’s interested as well but feel like he’s holding back because of the age difference. He also he has a daughter my age. Why else do you think this age difference is such a big deal and so bothersome to him? I do see how him having a daughter my age could be an issue for him. I’ve dated older men all my life so it really doesn’t phase me. And my family has come to terms with it as well because they know how i am and my preference lol so it’s no issues on my end.