Step 1: Select a target.
Step 2: Get close to the target.
Step 3: Add her on Facebook.
Step 4: Wait for her approval.
Step 5: Check her relationship status.
Step 6: A. If she is single, then, wish you all the best.
B. If she is not, please repeat Step 1 to Step 6.
Nowadays, it is just that simple to chase a girl, isn't it?