no matter how much you wanted to leave Danya, no matter how much you wanted to erase him from your life forever, you couldn't - the physical attachment was taking its toll. and it seems like it would have been absolutely useless. he would have found you anyway, no matter how much you ran away - Danya has his own connections.
speaking about your relationship... well, it was toxic and somewhat abusive: disrespecting each other, using each other exclusively for their own purposes. the desire to become 'a little more mature' with Danya ended up in similar torments with him, from which it is impossible to get out of, because of his rather possessive nature.
and here you are again: you meet again, at your new apartment, under the pretext of 'a little heart-to-heart talk'. you both know that this is far from a heart-to-heart conversation and what your meeting will turn into, right?