I would say to go with friends (not sure if you do or not) and either try to ignore the people or stand up for yourself. I have similar issues about certain public situations, and I am very non-confrontational, but I think you need to try to coach yourself in standing up for yourself.

I know from experience, people continue to harass you if they know they are affecting you.

I wish I could help you more. I know how hard this must be. But try not to let them ruin the things you cherish.

Good Luck.