I just can't.

I'm naturally very thin and I was informed that I'm considered extremely underweight. I've been trying so hard to gain weight, drinking nutrition bars and drinks, but I've found that I've been slipping, and just eating those and not eating any other food. The idea of food just makes me want to throw up, I just can't make myself, I just can't. What do I do? Is there any way to change this repulsion towards food and increase my appetite? Or should I just be hospitalized for my weight. Cause the urge to starve myself is there, and it's sort of strong, especially right now that my appetite is basically nonexistent... I know how easy it would be for me to go that way...

Meh, this should be in the depression category and not eating disorder category, I assure you. If I had anything to live for and didn't have this hopeless darkness hanging over my shoulders all the time, I would want to gain a lot of weight, but it's just seemingly impossible for me to achieve that.