Hey theme steer
Yes ,you have leaned on her all those times and used her for a shoulder,but try to see her side of a story through her eyes:she is in emotional distress now,you should not stop and turn your back on her at this crucial point for her and let her to go through her pain alone ( even if you want to shelter her from your emotions) .she needs you now ,it is your turn to be there for her,for your friendship.she would not keep on being there for you if she would not really care,keep that in mind.Be there for her and you'll prove to her and yourself that you can take control over your life
Good luck and best wishes