we had a couple of friends who we met on holiday. turned out they lived about 30 miles away from us so we tentatively started meeting up, then went to each others houses, then went on holiday together. then went on holiday AGAIN together - big mistake!!! they were far too buttoned-up, judgemental, self-concious about going to the pool or sunbathing together, and so on.....
when we got back home, we left longer and longer gaps between emails, hoping they'd get the message. they didn't. in the end we got an invitation to their house and we decided it had to be a short, sharp finish. so we sent an email saying we felt our friendship had run it's course, blah, blah. and that was it, over. no more making excuses, meeting up on sufferance, wondering what to do. job done.
you either live with it or let it spoil your holiday - not just this time, but all subsequent times too. i know what i'd do but you have to do what you feel is right.