Khrea,
Whenever my depression is at its worst, all I want to do is sleep! I agree with the above posts, I'm not sure that you sound like you're in denial about it, I think that maybe your body has built up a tolerance to the meds and so you might need a stronger dose? And since it has been a gradual build up of tolerance you just might not have noticed it... until someone brought it up? Just a thought. Either way, I am glad that you have a friend who cares about you enough to bring it up... I hope you find time to get to your doctor soon, because if he thinks something other than depression is causing you to be tired like that, then you definitely need to know what's going on.
Hope you feel better
*hugs*