Who am I?

I always ask myself, Always sink in my mind, Who am I?, I still confused. who really I am?, I couldn't understand myself. Why I cannot same before?, What's wrong with me?, Why I cannot be strong like before? I am so weak, I am easy to give up. Even I did everything to back who I am before, It's useless! I feel like I'm empty, I'm still in pain. I want to escape, but the pain always bring me back, cause my heartache, Maybe next life I can make better version of me.