What does it mean when a guy checks you out like this?

Anonymous
So, I was sitting with this guy (we attend the same course) we were having an amazing conversation and made solid eye contact -he barely looked away. At a certain point, I stretched on my chair and he took quick glances at my waist and chest. What does that mean?
Also, last time he seemed vivaciously curious and asked me a lot of questions... then at the end of the day he finally asked if I'd have attended the course again next year, while biting his nail nervously. Why's that?
What does it mean when a guy checks you out like this?
3 Opinion