Question: how to tell her that you are in love with her?
Answer: Talk respectfully. Don't make her feel like she is less important.
Listen to her. Not just to the words she's saying but to the feeling she tries to express.
Compliment her. ... 
Try to show interest in things she enjoys. ... 
Consider her opinion before making a decision. ... 
Be forgiving. ... 
Plan a small trip. ... 
Set goals together.