I haven't been the same since she left me
Why do you think she's affected you so strongly?
I still think of her as my first love and I'm hurt that she left me like that.
I understand that she meant the world to you but being able to move on is so important. You should try putting yourself back out on the dating market or finding a hobby you're passionate about. It should help you feel better.
I have no money, I don't know what to do. I feel so sad and lonely.
Well the first thing you can do is try to find a job. Moving on will be hard but you need a place to stay and some income to pick yourself back up. Eventually the pain will go away but it won't be easy.