i think the best thing to remember is that 99% of people feel like this so your not the only one iv even met people who i thought were so confident but when you ask them they are really shy and have the same worries. i know it sounds corny but just try to be your self and relax when you meet people for the first time ask them about them selfs its the easiest thing to talk about. sometimes i'll just tell people that i met for the first time that i was nervous going/starting a new club etc and people seem to be great after that because they will know how you feel because everyones been through it. If you feel confortable in your own skin then others will pick up on that and feel confortable around you and importantly remember to smile!!! hope that helps