Most Helpful Girl
Well since you're 100 years old you better make move, man! 😂 I'm sorry, couldn't resist. But seriously, just say hi, ask her if you could sit next to her, start talking, compliment her. :)
Most Helpful Guy
If you haven't really talked to her yet, like at all, I'd suggest just a simple approach with something like "Hey I've seen you and think you're cute, would you want to grab lunch with me?" But you don't seem like that much of a shy guy either, so if you just approach her and ask her out for lunch it will do the trick. If she accepts she's definitely interested in meeting you. If she doesn't it isn't the end of the world, and if she messed up she might apologize afterwards or keeps staring at you.