Your situation is difficult because you are not detaching... You are doing the GAL things while still attached... So when you share special, lovely times while he is still walking away (not physically but in his mind, attitude) you see it as signs that things may be getting better. Intellectually you know that may not be the case, but emotionally you are hoping, grasping...
You made the mistake of pursuing when you got home... Perhaps he felt like he just spent a beautiful day with you, and you want more... It's not enough... BTW, I am sure the day was lovely relatively speaking, but I sense you were not exactly comfortable... You walked on eggshells...
Next time he questions you the way he does, why not explain to him that it confuses you because he wants you to leave him alone and not ask him questions, but then he doesn't do the same for you... And it gives you mixed messages...
BDings cause crazy ups and downs... and because you are picking and choosing different parts of DBing to put into practice right now, your ups and downs are all over the place...