I am sorry you are in love and having such of hard time.
But believe me, you can overcome this situation and learn from it.
Rudenski has pointed out a very important point: You said that she thinks you are a depressed person.
I used to be like that. I was very negative in the past, always worried or afraid of many things. I was a very lonely person. Nobody wanted to be with me.
Now I have changed. I try to be natural, but happy. I smile, try to see the funny side of everything, try to enjoy little things from life. Now I have tons of friends and I even do not miss my family given that I am by myself here at USA. Now I can go to bed smiling recalling memories of the day. We sometimes meet at the chat room here at curezone and laugh and laugh like little kids. It is very powerful way to heal body and mind.
Please, try to focus on what you need to learn to be able to have long term healthy relationship. People like to be happy especially young girls.
I dot know if she loves you enough or not. Give her some space and time and be patient, she will find out her real feelings.
But you need to find joy in your life, being alone or with a partner. This is central in order to have healthy relationships.