Unmotivated.

I'm on break from school right now, so I've just been at home doing nothing - all I do is lay in bed and watch TV or go on the internet. My mother constantly tells me that I should get up and go outside or something, but I just don't have the motivation to do that. I mean, I'd like to hang out with some of my friends or take my dog out for a walk, but I can't get myself to do any of that, either.

I've always been a lazy person, but I'm starting to get worried about my future. What if this lack of motivation sticks with me? Yes, it's summer, and teenagers are prone to staying at home and just hanging out, but I've been like this for a while - even during school. I still manage to get all of my school work done, but it's always at the last minute, and I copy other people's work most of the time (not on tests, just homework). I just don't want this problem to follow me when I'm older because I want to be content and successful, but I know I need motivation to do that.

People say I'm a bright kid, but I never believe them. I'm just some unmotivated person who stays in her room all the time just existing. It's an awful feeling because I want to change this, but I have no motivation to fix this motivation problem. I barely have enough motivation to finish this post. Sometimes, I feel really bad, too, because I feel like I'm a burden to my family. I don't do anything for them; I'm just taking up space.

Does anyone feel, or have felt, like this? What can I do to fix this?

Thanks.