Hm... oh...
So... mmmm.....
Blaise loves Draco, he always near, but he understand, that Draco never will be his. The same problem has Pansy. They are in the same boat. They understand each other, they always look on Draco, they always near.
But Draco don't know about it at all. He loves Harry so much, and he doesn't notice things around him. He thinks that Blaise and Pansy are the simple couple of lovers. He doesn't know how suffer they, becouse he has his own suffer.
May be now you can read again manga from the start, and you will understand what's going on yet?))
I understand you, English is foreign language for me too. I live in China, but my native language is russian.
If you still don't understand some moments - you can ask me)) But first try to read again, ok?))