N.,
Are you still doing counseling and taking medication? Maybe you should try to explain to her that it is a medical condition that you have. Look it up on the web and show it to her. Show her that it is not that you are unhappy because of her, but it is an illness that you suffer from. Explain to her that you are taking medications and are going to counseling because you want to get better and because she is so important to you and you love her so much that you don't want her to think that she is the problem.
At this age you need to reaffirm to her that she is the most important person in the world to you, and because of her and how much you love her and your relationship with her that you seek medical attention. Because you want your lives to be better and you want to be able to be there for her at all times. Try seeing a christian counselor, get involve in church if you can. Try planning activities to do with her, even if money is tight, you can still take a walk at the park, or around your neighborhood, or go to the movies one day (an early show), go for icecream or something like that. Go to the library and take a book out. Read together. Cook together. Try doing little things together. But you need to educate her about your condition, she needs to know that this is not something you are making up or something due to her!!! Knowledge is the best weapon you have to help her out. Give her the knowledge she needs to be able to understand you. And if you can, have her go to counseling with you.
I'll be praying for both of you.
Blessings