1. Pay Genuine Compliments: Compliment her genuinely and sincerely. Focus on her personality, actions or opinions, rather than just her looks.

2. Have a Sense of Humor: Make her laugh without resorting to offensive or inappropriate jokes. Humor is an attractive quality, but keeping it light and respectful is key.

3. Engage in Conversations: Ask open-ended questions and listen to her responses. Share your thoughts and opinions, but also remain respectful if you disagree.

4. Respect Her Boundaries: Understand that everyone has boundaries and respect hers. Take the time to learn what she likes and dislikes and don’t assume she’s comfortable with everything you are.

5. Be Yourself: Don’t pretend to be someone you’re not in an attempt to impress her. She’ll appreciate your genuine self over someone trying to put on an act.

6. Show Kindness to Others: Treat people around you with kindness and respect regardless of who they are – this will show her how you would treat her as well.

7. Be Confident but Humble: Confidence is attractive, but there’s a thin line between confidence and arrogance. Be sure of yourself without becoming self-absorbed or condescending.

8. Be Supportive: Offer your support when she needs it, whether it’s emotional or practical help. This shows that you care about her well-being.

9. Express Your Interest Clearly: Let her know that you’re interested in getting to know her better by suggesting activities that you both might enjoy or asking questions about her interests instead of just making general statements.

10. Take Things Slowly: Don’t be overly pushy or impatient when showing your interest – take your time, be patient, and let the relationship develop naturally.

11. Show Genuine Effort: invest energy into the potential relationship, by planning thoughtful dates or initiating meaningful conversations.

12. Respect Her Opinions: Everyone has their own thoughts and beliefs, so it’s essential to approach your conversations with open-mindedness and a willingness to learn from one another.

13. Be Consistent: Stand up to your own words by being reliable and consistent in your actions. Show her that you are a person she can trust and rely on in the long run.

By following these tips, you can express interest in a girl in a respectful, non-creepy manner, which will increase your chances of developing a strong, healthy connection. Clear communication, mutual respect, and genuine effort are foundations of any successful relationship, so make sure you prioritize them when trying to show interest in someone special.