1. Be Genuine: The most important aspect of expressing your feelings is keeping it genuine. Be yourself and don’t try to impress her with a fake persona.

2. Give Compliments: Compliment her genuinely, focusing not only on her looks but also on her talents, personality, and intelligence. This shows that you pay attention to her as a person.

3. Share Your Interests: Talk about activities or hobbies that you both enjoy, which can provide an opportunity to bond over shared passions.

4. Make Eye Contact: Making eye contact while talking to her communicates your interest and confidence.

5. Spend Time Together: Organize group activities with mutual friends so you can spend more time together in a comfortable setting.

6. Listen Attentively: Show that you value her opinions and perspectives by truly listening to what she has to say.

7. Be Respectful: Treat her with kindness and empathy, which goes a long way in showing that you care for her well-being.

8. Write a Letter or Note: Expressing your feelings through written words can be both romantic and thoughtful.

9. Help Her Out: Offer assistance with small tasks whenever she needs help, demonstrating your reliability and supportiveness.

10. Notice the Small Things: Pay attention to the details of her life – remembering her likes, dislikes, and stories she’s shared – proving that she matters to you.

11. Flirt Subtly: Use playful teasing or light touches to flirt without overwhelming her or being overly aggressive.

12. Show Your Vulnerability: Open up about your own emotions, fears or experiences as it can create a deeper connection between both of you.

13. Attend Important Events: Be present at events that matter to her, like an art exhibition or sports events she’s participating in which will underline your commitment towards knowing more about her world.

14. Share Music or Movies: Send her songs or movie recommendations that remind you of her or have a special meaning conveying your true emotions.

15. Be Direct: Sometimes, being direct and honest about your feelings is the best way to tell a girl that you like her. Choose the right moment, relax, and be brave!

Expressing your feelings to someone can be both exciting and nerve-wracking. Ultimately, the most vital aspect is being genuine, empathetic and focused on building a strong foundation of friendship. By doing so, you are setting the stage for a meaningful and enduring relationship.