I used to lack self-confidence too, but I told myself that I
must make some positive changes in my life because no one else will
do it for me. It will feel awkward at first, so start slowly. Maybe
try talking to yourself in the mirror, then maintain eye contact
with passersby, then slowly to people whom you are going to talk
to. Look above their noses if you feel it's too hard to look into
their eyes. 
