I hav dark marks on my face made due to squuezing of pimples ...this makes me less confident to talk to somebody or face a group..what to do?

Body image: The dark spots will fade in time. Hopefully you can get your acne scientifically treated and stop getting these. Since this is all you can do, train your mind to think about how your movements look and what you have to say, rather than how you look in a mirror -- the people around are much more aware of the former. If this is a major psychological issue, your physician can help.