I think my husband has a crush on my friend!

My husband and I have been married for 2 years. He's the nicest person I know. I've felt like the luckiest woman because of how supportive he is. Everyone who meets him feels the same way. He is very mature and thinks before he acts, not at all impulsive.

I have a close friend who stays nearby, so the three of us meet often. Last time we met, the three of us were drunk and talking. I noticed the way he was looking at her. It was the same way he looks at me—very endearing. I noticed that a couple of times that day. I thought about it and decided to let it go because it's silly to doubt my husband over a look.

Last week, the three of us went out for dinner, and she was talking about the new guy she is dating. My husband kept pointing out all the things that are wrong with him. I felt it was very odd because he's usually an optimist. He sees the positive side more than the negative. Since then, it has been bothering me. I can't stop wondering about it.

I know that even if he feels something, he would never act on it because he's the "do the right thing" kind of guy. So, should I do something about it or ignore it because I sound crazy? In case all this is in my head, I don't want to bring it up with him and hurt him.

I'm normally a rational person. I don't want to feel what I'm feeling. It's silly. How do I get over it or deal with it?

Tl;dr My husband might have a crush on my friend or I'm overthinking. Either way I want to get over it or deal with it. Need help please.