I've only watched 'Crazy Little Thing Called Love'

happy birthday - sad, but really good in my opinion 
I'm not sure what kind of genres you would prefer, but Thailand's film industry is ruled by horror movies. I am not entirely fan myself of this genre, but here's a list of Thai movies I enjoyed to watch.

Tom Yum Goong
Headshot
The Gangster
Slice
Pee Mak
Sat2Mon  
   

And in case you have some time and haven't watched these; You could watch the King Naresuan anthology as well (5 movies) or Ong Bak (3 movies)
Thanks! I'll check it out :D
the library - beautiful main actor and actress
I Fine..Thank You..Love You - i really enjoyed that one its pretty funny and the romance is cute
http://mydramalist.com/12160-i-fine..thank-you..lo...


Here's a couple of 'slice of life' Thai films I've enjoyed:

My Girl

Top Secret Wairoon Pun Lan (This one is based on a true story)