Change the dynamic: Stop being her "emotional vest". Do not respond to all her messages immediately, stop doing "friendly" services. She should see you from another side.
Emphasize your attractiveness: Start working on yourself - sports, new interests, stylish clothes. She needs to understand that you are not just a "good friend", but a man who is attractive.
Include light flirting: Allow yourself light compliments, innuendo jokes and moments that show that you see her as more than a friend.
A pitfall to avoid:
Do not pressure her and do not demand reciprocity. Everything should happen naturally.
Friendzone is not a sentence. This is an opportunity to show who you really are and change her attitude towards you. Instead of waiting for change, start taking action!