A little sample of the two's bond. Pretty much Crow feels protected when he/she is around Quill and sometimes his/her feelings causes her/him to enter Quill's personal space which he doesn't have with ponies such as Crow. Quill on the the other hand can easily read types like Crow so he knows Crow has that bond of trust and protection around him, but is still uncertain whether or not Crow's feelings with him is sibling based or something entirely different. So in the mean time Quill is just gonna focus on his book series while making sure that his new roommate feels secure/safe with his/her new home.

Clockwork Crow ©
Quill/Art © (me)
Mlp Fim © Hasbro and