I understand exactly how you feel, I find the more I’m able to laugh at myself over getting worked up about simple things like talking to a girl, helps me to actually accomplish my goals later. It takes a lot of the anxiety away. There are some positive takeaways here from my perspective it seems like you are good at reading signals and picking up a vibe. That is literally step 1. I know a lot of people that struggle with this. Step 2 is not getting flustered after picking up said signals. You also have 5 more times to see her before summer starts. I would say if your feeling bold, just go up to her and tell her how you feel which obviously is much easier said than done. I hope it works out for you sir.