When it comes to expressing interest in a girl, it's important to be respectful and genuine. Here are some English phrases you can use:
1. Compliment her: "You're really beautiful" or "I love your smile."
2. Show your interest: "I find you very interesting" or "I enjoy talking to you."
3. Ask her out: "Would you like to go out sometime?" or "I'd love to take you out for dinner."
4. Express your feelings: "I really like you" or "I have feelings for you."
5. Be direct: "I would like to get to know you better" or "I'm attracted to you."
Remember to be confident and sincere while expressing yourself. Additionally, it's important to respect her response, whether it's positive or negative.