Dave ans his at the time girlfriend, had you pretty early... Since he was only 24 when you came to life. Even tho he didn't want you at beginning, after he first saw you, he was obsessed with you.

But as you started to grow up and eventually reached the point where you were teen, even tho you still had a strong bond, he started to understand you less and less... He felt like whatever he said or did, it was wrong.