Raise your hand if you've watched a Thai movie before. If you haven't, I'm recommending a movie I watched recently called "Friend Zone", which is exactly what you think it's about. It's funny how the "friendzone" concept transcends languages and cultures and can exist pretty much anywhere around the world.
I rarely watch foreign language (non-English) films, but when I do I always find them enjoyable. A couple of years ago I watched "Bad Genius" (also a Thai movie) and loved it. Last year I watched a local Chinese film called "Think Big Big" which I also enjoyed. "Friend Zone" is ridiculously hilarious, but also very sweet and emotionally driven as well. Not to mention that parts of the movie were filmed in Malaysia too, which scores bonus points from me. Definitely on my favourite movies of the year list.
When all you watch are English films, watching a foreign-language film is a good change of pace and a very different experience. It's not just the language that is different, but I also find the movies themselves to be quite different as well. Different cultural norms, different ways of expressing humour and emotion, different film-making and cinematic styles, it all contributes to the experience of watching a non-English film, which I highly appreciate. If you enjoyed "Crazy Rich Asians" for it's Asian influences, imagine watching a "true" Asian movie. Perhaps this is an example of the Sapir–Whorf hypothesis?
I'm not sure how or if it's even possible for people outside of Asia to find this movie, but if you can, I highly recommend it.