Hi, i was bullied and have ended up being really really shy, if its really bad you may have SA (social anxiety disorder), you should look it up on the internet, have a read about it and if you think you have it see a doctor i don't really have any better advice as im only 14 and still going through this stuff myself, i hope you feel better byexx
P.S If you type "social anxiety sa uk general chat" into a search engine you will find a website where there is a chat for people with sa, its friendly supportive and most the people there are 20+, you can go there and chat to people who understand... xx