I have really low self esteem, i need help and how to be more positive about myself?

Therapy: Find a therapist w/ whom you feel comfortable talking. Cognitive & esp. Behavioral therapy may be particularly effective. Simply talking about how you feel, by itself, may take a long time to bring change. Doing something that gives you a different experience can be key. Acting yr way into feeling & thinking differently can work better than trying to think or feel yr way to acting differently.