You are too modest, my dear.
Yes, it is a good compliment.
You have to compliment her.
Avoid her
Yes. Then, you will be flirting with her.
You can give her a compliment (:
It depends on the compliment. If you make a crass comment (or a compliment, in your mind), the girl may feel that you only care about her body, and, in that case, she walks away offended. If you make a kind, sweet compliment, she may either be surprised and speechless. She may like you, and feel shy and awkward because you complimented her. As long as you treat a girl with respect, she will become comfortable around you.
say: you look lovely today
I should think that was a compliment.
be nice to her compliment her talk to her make her laugh
Pay attention to her. compliment her and talk to her as much as you can
Be really sweet, compliment her and always be there for her.
you just say hi. compliment them or something.