First of all, you're ugly because you think you are. Try to think things that aren't negative, don't be shy. Everyone are all the same we are all equal as human beings. If you feel sad listen to the songs you like or anything that makes you happy/pumped, try to talk to people, start a conversation, ask them what they like and try to find what you and your partner are in common. Always try to be happy even if you don't feel like it(trust me, it helps me). Ignore the people who are teasing you. They're just assholes that wants attention or acting all "cool and badass". In the future, they'll just be those guys who are poor and ends up in jail and doing stupid things in life. Just try and avoid all the negative things and be happy that you're alive. Be happy for what you are. Don't be someone that isn't you. I hope this helps you and remember, be happy for who you are, for what you are. Life is a great gift. You just don't know it yet.