Look dont worry about it.I had a mate like that at work we had a few jokes and shit he was cool as and i liked him alot.We worked just us two split shifts so from 4am-8am then 4pm-10pm.We had the best fun and would sneak away from work and go to the pub and have a few drinks.If you feel worried just tell them that you had an accident and feel a bit shy im sure they would appreciate your honesty.He told me why his eye was like that his father did it when he was 9 he bashed him so bad and didnt take him to hospital.Girls will love you no matter what just try and be a bit more confident.This guy was so shy with me also but once he realised i was a cool fun girl he wasnt shy anymore.