This is an 18+ site, and you will be able to post again in 2 years, but I will try to give some advice anyway.
Try to maintain eye contact, instead of looking away. That is a sign of deceit, and people may not trust you because you cannot hold eye contact. Eye contact is also a sign of confidence, and respect for the person you are talking to (this is not the case is many Native American cultures, where it is considered rude and challenging). So what if you have a long nose? So do many historic figures of great power. Look at portraits of European nobility. If you feel insecure about it, others can sense that. MY brother has a long skinny nose and he's always been popular with the ladies- it's simply that he is very confident and has a great sense of humor. So pick up that chin, act confident even if you don't feel that way, and you'll be fine!