I know it as Faen, but seems like the English title is indeed Alone. But as most Thai movies, it's probably shit-ass-poopoo hard to find. Never could find that comedy we went to watch, either (Korn-bai: The Movie). Can't even find it on IMDB, but still got the film ticket somewhere. Couldn't find http://www.imdb.com/title/tt0989622/ either (which is made by the most famous comedian there, so it's a surprise that it's just that hard to find!)