I think that you could try to get into whatever your friends are doing, and its normal to be quiet around them at first.
i understand that its tough, but there's always a learning curve to everything. You never try, you never know.
Sometimes there's times where its better to spend your time doing your own personal stuff, sometimes there's times where you feel like enjoying with others.
it depends on how you're feeling at the moment. So i think its just best to relax, be natural and enjoy whatever you're doing.
The more relaxed you are around others, the better the experience you'll have too.
and no matter what you're doing, remember to take care of yourself, stay safe .. and be relaxed and just immerse yourself in the moment.
if you wanna rant, you know that i'm always around