I'm looking for a yaoi where the MC falls apart. After a break up, or a sudden disappearance of the loved one.
Something where the MC seems like his soul was sucked out of him, an empty shell, or not functioning properly (to the point where it may cause health issues).
I guess I want that can't eat, sleep, think straight sort of distraught.

The only examples I can give would be
Yume no Kodomo

When Ren goes overseas for 10 days how Youji wasn't his normal self.

Aishuu

How Jin ends up in the hospital, because Kaoru left him.

(Even these are a mild extent of what I'm looking for).

Thanks for taking the time to read this post.

Sidenote - I tried seeing if there were other threads talking about this, but I was at a loss at what to search, so I didn't do an extensive search as I would like to. If there's one or more on this subject, please feel free to write them.

Yes yes, I know I make longwinded comments, but that's just me >.<
I should proof read my comments more, but I won't...
So keep in mind I'm filled with typos

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Senya Ichiya - Shitone no Himegoto
Very beautiful yaoi about a guy who can't forget about his past lover, whose death left the uke traumatized.

Thank you fore the suggestion. I just finished reading it.
It was beautiful, and a nice read, but slightly off on what I was looking for, but thanks again.

Yes yes, I know I make longwinded comments, but that's just me >.<
I should proof read my comments more, but I won't...
So keep in mind I'm filled with typos

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Maybe Kyuuso wa Cheese no Yume o Miru
and its sequel.

Though the second MC is the most emotional of the two.Or at least shows it more by crying,shouting,etc..

Already read that, and the sequel. Still not quite what I'm looking for, but it's a nice suggestion. Thanks.

Yes yes, I know I make longwinded comments, but that's just me >.<
I should proof read my comments more, but I won't...
So keep in mind I'm filled with typos

Check out FAQ and Forum Rules if you haven't yet.
For errors linking in threads

• Demian Syndrome: http://www.mangaupdates.com/series.html?id=1307
• The Heart of Thomas (they weren't dating; but it's good): http://www.mangaupdates.com/series.html?id=12379

Jazz fits, I think.