It Doesn't Feel Right..

I haven't posted here in a while!  haha..

But I'm kind of having a problem and I'd like some other views. 

I exercise...a lot.  I don't really have a choice because of my PE class, but I'm having a lot of trouble eating enough.  I eat when I'm hungry, and I eat healthy foods, but I always seem to find myself stuffing food in my face at the end of the night just to get up to a halfway decent amount.  Like, I seriously stuff about 1000 cals every night and it still doesn't put me at maintenance.

It just feels so unnatural having to do this...shouldn't I be able to just listen to my body and eat when I'm hungry? 

It's not even that I eat a lot of low-cal foods...I have the whole wheat pasta and oatmeal and rice and peanut butter but I just don't get hungry.

Should I keep making myself eat so much even though I don't get hungry?  I hate the feelings I get when I have to do that, but there just isn't enough time in the day! 

I don't want to slow my metabolism (if it could be slowed more..) and I'd like to be able to maintain on a normal amount without gaining.

Thanks for any help =)

I have been increasing and have been between 1900-2300 the past couple days...but I've been avoiding the scales so who knows what's up =\

Nads- What kind of exercise do you do?