A movie in which, a group of people move to an island among them there will be a couple and a guy, later the guy gets the girl and the couple breakup. at the end the solo gets a dream of haunted by a tiger,.... Can any one name the movie
Sounds like The Beach.
Now, it's been quite a while since I've seen the movie, and I don't explicitly remember a tiger per se, but everything else seems to fit insofar as my feeble old brain remembers the movie itself.
Alternatively, if it was a polar bear instead of a tiger, I'd suggest the TV show Lost which also seems to match up kinda, sorta, maybe a little bit with the question. NB I never got beyond the second season of Lost, so take that suggestion with a grain of salt.