I am in love with my friend whom I know like from 1 year and she considers me as a good friend. She always used to share a lot of things about her ex with him after the break up. She is used to cry a lot, so I thought as a friend I should console her. I gave her a lot of support emotionally and helped her in her career. But I didn't realize I was falling for her. Now I know I cannot forget her and want to express my feelings to her. But she says that she does not want to get into any relationship. So I am confused whether to tell her that I have feelings for her or not. I don't want to lose her as a friend.

So i am confused whether to tell her that i have feelings for her or not. I don't want to lose her as a friend.
Since you don't want to lose her friendship, you shouldn't tell her your feelings. The odds are likely she feels the same way and wouldn't date you since it could destroy the friendship.

First, relax and they it easy. She is still in the state were in she needs to recover from the pain of losing a lover. Its hard in her part.
This is the time that she needed you most. Not romantically, but as a friend. Start doing what a real good friend do!
By doing this, she will feel better. She will start falling in love with you without telling her your feelings. Just by showing your genuine care, you will capture your heart. When the "fruit is ripe, that's the time you need to pick it". When the time is right, you can tell her your feelings! That time, she already had fallen in love with you!