<human>: Alright, 27M pursuing a 25F. We're dental school classmates and just started our first year and are a few weeks in. We've had events to socialize and get to know each other and have kind of clicked. I was initially attracted to her but didn't act on it initially due to being ridiculously busy.

Then one day, she started sitting right next to me when there were tons of seats elsewhere through the classroom. I figured she just really enjoyed talking to me and wants to just be friends and sidelined extra thoughts about it. Then one day where she didn't sit next to me, I was headed to lunch, and she comes running out of the building yelling my name to see if she could join me for lunch. I started thinking that she may really like me now and started kind of looking for hints. A formal put on by the school requested that you come with dates. So I asked her. She responded that she was flattered I asked and that it would be fun, but had made plans to go with her roommate that night. Wanted to meet up anyway at the formal. 

After karaoke and dancing, there's even further thoughts going through my head that she's interested, so I went ahead and asked her to go to the zoo after our first test and she said yes. Well, I made the mistake of not specifying it as a date. So now I'm wondering if I should clarify it as a date before this happens or should I just play it off and see how she wants to classify it? I honestly don't know if I'm misreading her signs as something other than being friendly. We catch each other looking at each other every now and then when in our larger, assigned-seating classrooms. I have no idea how to take this supposed mutual attraction and turn it into a legitimate date. I'm trying not to be the pestering / annoying guy, so I feel this is just dragging on when I should be focusing on studying. Please help.

Condense the text into a few key points
<bot>: Can't tell if this girl thinks our zoo outing is a date or not. Should I tell her I want it as a date or just let her decide?