Where do you draw the line?

So....
I had a fight with my boyfriend of 4 yrs today.....
about a conflict of interest religion.....
i've converted to his religion to make him happy and i've always been curious about his faith and i see there is nothing wrong with it.....

However.... i have a confort zone... i'm a bit of a quite person liking to keep to myself and am not overly outgoing.

He likes to PUSH my boundaries...
He likes me to go where i don't want to go....

He's reigious group are having a camping trip thing and he wants me to go... he INSISTS i should go... he's FORCING ME TO GO... because he thinks it's good for my self esteem and making new friends etc....

I consider camping with strangers for 3 days outside my comfort zone... i dont want to go....

i think that when i'm forced to do something i get bitchy...
and when i'm forced to be somewhere to get to know people i shrink back....

i am anti social i like the friends i have and i frankly dont really care if i don't make anymore...

my boyfriend thinks other wise.. he thinks that if we are to get married we should have common interests and seek to travel in the same path....

he thinks that by me being anti social i'm being a coward and i should learn to grow up and act like an adult....

should i learn to grow out of my comfort zone? or should i stay as i am and if our relationship doesn't work then it wasnt ment to be..,.