Stuttering more when in casual conversations with people you aren't super close to?

Stuttering more when in casual conversations with people you aren't super close to? I've noticed after this weekend that I have waaaaaaay more blocks when I'm talking about casual things with people like supervisors, professors, or other people who aren't strangers, but aren't friends either. This weekend I spent every hour with my girl-interest person, and I didn't have but maybe 3 blocks. I felt like I was confident in what I was saying. However, today after a business meeting reception, people were standing around drinking and talking, and when I was asked something like, "how's your schools football program looking for this fall?" I could barely get anything out.