If this would be a love letter

This one it is a part of my Instagram project that I think it started today. Her name is Justine and I think I'm on my way to catch feelings for her, I know her for a while and we are good friends. Tonight we have sort of a date, I mean... I think it is. We go out with some of her friends and I'll be around.

How should I behave? I surprised her with this piece of illustration and she was very pleased and happy but what should I do next?