Is it wrong to want the man I'm in a relationship with to prioritize me?

I'm a 23 year old female. I fell in love with a 55 year old man. A month into it, i find out that he's married and has kids. He apologized for not telling me and said he's going to separate from her. He did (because she found out) and we're together now. I feel really sad because he tells me he still loves his wife (as a person) and I know he will prioritize his wife and kids over me always. Is it wrong to want a man to prioritize me?