Volume 1 moments
Yang went after Blake to help Ruby make friends. Then in the Emerald forest Blake chose Yang as her partner. They realise a script and it shows it being alot more intimate.
Volume 2 moments
Yang and Blake have the heart to heart moment and first dance. Yes she went back to Sun after. But that's because be asked to the dance. Yang only asked for a dance.
Volume 3 moments
Blake having a hard time believing Yang when she broke Mercury's leg. But still trusted her.
Then when fighting Adam Yang went full berserk trying to save Blake. Losing a arm. Blake risked her life to get the unconscious Yang to safety. Then ran away blaming herself for what happened to Yang.
Volume 4 moments
Yang is depressed more about Blake leaving then her arm being gone.
Blake gets mad at Sun for getting hurt fighting Ilia and brings up Yang. Saying how she wouldn't hold it against her for what happened.
Which Yang never did hold it against Blake.
Volume 5 moments
Weiss helps Yang understand and work through her anger about Blake.
Blake talks lovingly about Yang when describing her friends.
Blake then says she wont run away again they all welcome her back.
Volume 6 moments
They have a hard time. Blake's trying to hard and gets on Yangs nerves. But Yang still cares for her. Since in the literal burning house Yang drags Blake out and no one else.
Then their fight with Adam reasureing the other of their feelings to each other.
7 had them flirting in every other scene. While 8 had the separated for a day and still thinking about the other. When they reunite they had a soft moment and hugged.
When Yang was starting to fall. Blake was the first to react. She had the biggest freak out compared to everyone else to Yang falling. Then risked it all to save Ruby because it's what Yang would have done.
That's enough for you or do you not even care. Plus all their team work off screen mastering team attacks