ok DRca plz plz tell me one thing??

I can't tell you if he likes her, he is the only one who knows it. But no, they have never dated, he is now dating Olive Uniacke (David Heyman's stepdaughter).
Personaly I think he likes Emma very much as a sister, they are best friends, they have grown together, so I think it is normal for them to hug each other and hold each others hand.
And when he hugs her, it looks like a brother hugging a sister, not a boy hugging his girlfriend or his crush.