Advise needed please

Last night, my husband and I had a few drinks together. It was so much fun. My husband got very intoxicated and we were having different conversations about everything. It was so much fun! One conversation led to another, my husband started telling me about all the girls that he dated in the past. He also spoke about this most recent ex-girlfriend that he dated before we met. He seemed so happy when he was speaking about this previous ex-girlfriend. He raved about how much he was in love with her, and how he would’ve married he if her father had accepted him. I already know this story. He wanted to marry her, but her father refused due to my husband being of black. The girl did not want to upset her father so she broke up with my husband. I know this story already, but I felt some sort of way while he was talking about it in that manner to me with so much passion in his voice. He mentioned that they lived together for four years and they had no single argument, he said that she was so perfect. He said “that’s why sometimes I am shocked that you and I argue sometimes. I lived with her for 4 years and no single argument”. I’ll felt some comparison going on. Obviously I know that it was just an harmless conversation, but the way he spoke about this ex-girlfriend just made me feel very somehow. Now that we are both sober, I just can’t stop thinking about it. Would it be childish of me to bring up the conversation again and ask him if he still feels that way about her? We have been married for 7 years but I don’t know if he has emotionally moved on from her and healed. Now I can’t stop imagining that in his head, he may be comparing everything I do with what she did. Should I just let it go?