Seriously, very easy fix here -

HANG OUT WITH OTHER PEOPLE. If you’re an adult, How are you getting bullied? Go somewhere else. You are in charge of your own life. Sure (if you continue hanging around these assholes) the MIGHT continue to rag you for this, but if their collective lives are so small that they cannot move beyond this one thing, they aren’t going far and you can trust they won’t follow your future.