You know, bad people don't actually think they're bad. They always have some sort of excuse in their mind. That's how they live with the way they are. You on the other hand, express concern about being "bad", and about manipulating people into thinking you're good. This is the sort of thing a good person, albeit one with low self confidence would do.
Think about it, why would you be bad? What makes a person bad? How do these things apply to your life, if at all? Sometimes when we feel down, we are more likely to feel like bad people, since bad people get bad things in life. However, this is not true. When I read your post, all I see is someone who has been hurt by life, not a bad person. I hope one day you might be able to practice a bit more self confidence and self love, and come to this realization yourself.