Lesson 1) Don't lie unless it is about whether the jeans make her ass look fat, or her new hairstyle.
Lesson 2) Grow a pair and understand that no means no. If she wants to friend you, then you have to decide if you can be just friends or not. If you cannot, then you need to just stop talking to her and both of you need to respect each others decions
Lesson 3) Don't be an idiot.
"Well, then," the Cat went on, "you see a dog growls when it's angry, and wags its tail when it's pleased. Now I growl when I'm pleased, and wag my tail when I'm angry. Therefore I'm mad."