Friend Request

Scenario:
Tina is 16 years old and has recently accepted a friend request from a stranger on Facebook. She has been communicating with the stranger daily and she enjoys talking to him. They have exchanged numbers and sent pictures of each other back and forth and now he is asking her to meet in person but he also asks Tina to keep it as a secret. He tells her that he can pick her up with his car when her parents are away. Tina finds strange the fact that he doesn't to reveal to her friends that they will go out.
What should Tina do?
