Very few men really understand what are the best things to say to a girl you like. Still, talking to a girl is not rocket science. All that you require to do is to be nice, kind, gentle, sweet, and thoughtful. This does not mean that you should flatter. Some amount of flatter would always please the girl, but when you overdo it, she would easily see through you. Similarly, too much pressure would drive her away, giving a feeling of intimidation and rudeness.
If another person makes fun of the girl or behaves roughly with her, seize the opportunity to defend her. Girls normally like persons who talk to them openly and honestly. Avoid words like ‘You are hot’ until you become very intimate. Use words like ‘You are very pretty’ and ‘You are breathtakingly beautiful’. If she questions you about any of her negative aspects, immediately refute that point without hesitation, even if you are aware of that particular negative aspect. If you hesitate before replying, she would only think that you are not being honest but just want only to please her.
In the beginning, keep the conversation to general topics like movies, food, cars, pets, etc. Talk about her friends, the music she likes, and stuff like that. Do not get into serious subjects like personal interests, hobbies, sports, etc., which could lead to difference of opinion or clash of interest. Show a genuine interest in what she likes and put mildly probing questions about such matters. Your discussion should be natural, relaxed, and casual. She should feel that you are genuinely interested in her and in her likes and dislikes. Even when you differ with her on a particular point or a specific subject, avoid any kind of disagreement. Later on, when you had understood each other fully, you would have ample time to show her how she was wrong on a particular subject and she would not be antagonized. These are some of the tips on best things to say to a girl you like. You could surely think of more, if you apply yourself.