Sunloathe

I think the speaker is saying that he loathes the sun, because he is jealous of the happiness it brings to others. Happiness he doesn't feel yet, because he's feeling a little down and he's sure that this feeling will come to pass, but right now he hates the sun, the world and everything on the outside that keeps on going cheerfully makes him feel left behind and left out to figure it out but he knows he'll pick back up again someday...until then, this guy's pretty much in league with the average albino I guess.

The song seems about overcoming a disease like depression or a drug addiction, which was personal at one point for him. And perhaps everyone. He doesn't want any positive thoughts as his life is ending from a his patterned lifestyle.

"But kill my memories with a cheap Disease"

He doesn't want to lose those memories, but they are killed by this 'cheap disease' in depression

It could be also cancer or disease... but it seems like a lack of will further reinforced by an addiction or depression from constant daily monotony.

"Remove my misery It's all or nothing I see I don't wanna lose this fight I don't wanna end this fight Goodbye"

It's "I loathe the sun," as in "Sunloathe."