Don't spend time thinking about your past or what's going to happen in the future. Just think about the "now", deal with the problems when they come. Don't spend time worrying, you achieve nothing from it. Just go with the flow, not against it.
You will never be happy wearing a mask because you fear what people might think. The only way to seek happiness is to be yourself, you might be alone in the beginning but later you will find people who will always love you for who you are, not the mask you place on your face.
When you notice that all your friends are only there because they want something for you. If you don't give them what they want they leave you, but it's better being alone than wasting your time with masked people.