Ohh my gosh!! I can't believe he said that! If I were in Ann place I will feel worthless and pain... (she's really a good actress...because from her expression I can feel her pain)...
On the other way, we can see that somehow Kawee forces himself to say those words... it looks like don't really want to say, but he said it because he doesn't want to show his true feeling or he scares or he doesn't want to be too attached to Narin... And Ken really does a good job also... Like he's really falling for Narin, but don't want to express it....
Thanks so much for translating that part !!!