What am I?

I have some nocturnal habits although I am not afraid to be active in the middle of the day. Usually though, I just feel lonely. Every night I am comforted by the feeling of someone being close. It always makes me feel like it is my purpose to protect them. Is it bad to wish that they could always stay longer? It irks me when a person is with me but either pays attention to t.v., cell phone, or paperback. When they turn those off and put them down it becomes one on one time or my favorite time of day. Sometimes they talk to me and other times we wrestle. When I'm lucky they'll make me look my best and when I look my best I feel my best! But, I feel as though the special treatment for them is to compensate for the fact that they will leave because they always do. When they leave I feel cold and useless. The only thing that keeps me here is to see the smile on their face when they finally see me.