For the past few nights, I've been having a dream where I started losing parts of myself. I'm wandering up a hill or mountain in a forest setting. I know I was going somewhere, but I can't remember where.
First night of having this dream, I lose my left eye. After that, all I could see was in black and white, except for me, I'm completely in color.
Next thing I lost was both my ears. Sounds could still reach me, but they were sort of muffled. Like if you had water in your ears.
Then, my left hand goes missing. The severed wrist was bleeding too, and when the blood dripped on the ground it maintained it's color too. Next was the rest of my left arm up to my elbow. And the other night, I lost my right hand. It's really worrying me, and I'm afraid to go to sleep.
Each night would resume about where it left off! (That's never happened to me with a dream before) There were times between some of them in which nothing is lost, but I'm wandering around anxiously and confused (as I would react to such things). Another strange thing about this is the fact that in most dreams, I can feel everything, even the most excruciating pain (and it doesn't usually wake me up)...but in these dreams, I don't feel these body parts detaching from me. In fact I usually don't notice until I feel like somethings off and check (the exception being the eye, that I knew right away).

Please, someone help me interpret this. Maybe if I know what it means or why I'm having this dream, I might be able to have closure and put an end to this nightmare.

Has something changed in your house just before you started getting these nightmares? a new furniture or gadget perhaps was added. Lay out of the house or the room has changed. maybe even the direction of your bed or the direction of your head when you sleep.
just do a check and maybe this dream is connected to the vastu of the place.
vivek

This is how I would interprete the dream if I had dreamt it, so some connotations may be off...

Walking up a hill or mountain implies you are struggling to reach a certain goal. You wanna do something in your life, but it seems as if it's a continuous difficulty to get there. It are these difficulties that are affecting your attitude in the world towards this situation.

First of all you lose your left eye - becoming one-eyed means you start to refuse to see other people's pov, become one sided... this is emphasised by the black-white vision... you will start to see the situation in black and white terms. Except for yourself, you're not recognizing other people's motivations and pov, lose understanding. The left eye stands for the more intuitive side, and so this means that your view becomes a black white outer world factual and overly rationalistic view.

Once your thinking becomes black and white you lose your ears - that is you refuse to listen to the arguments, reasons, explenations of others around you in this situation. Their efforts to make you see their pov as well as yours starts to fall on deaf ears.

After refusing to recognize another pov and refusing to listen you lose your left hand - the hand is a means of communication and reaching out to others... so this means you stop communicating more and more, especially first the feminine part (caring and understanding) closes off. And the more they try to appeal to this side of you, the more you refuse (lose arm up to your elbow)...

Eventually you lose your right hand as well - right is the rational, reasoning side... you even stop reasoning with the people.

So... because of te difficulties you are experiencing in reaching your goal, the more you seal yourself off from those around you... black and white one sided thinking, not listening to them, and not communicating anymore (not humanely nor reasonably).

The dream is telling you that the more you seal yourself off in order to reach your goal, the more difficult you make it for yourself, the more you will wander and isolate yourself. You'll need to cooperate and communicate in order to make others cooperate with you and help you reach your goal.

PS... just noticed the OP is only 15. Hope it's not a problem. But probably explains your self inflicted isolation... in your stage of life it's normal to try and do it all on your own and to refuse to see the pov of others, especially when meeting opposition... it's a stage where you want to reassert yourself, what you want... and in that stage you'll learn the hard or soft way to cooperate eventually.