So no, as you can see, Jun is NOT suicidal/depressed/going blind/whatever. The whole entry (well, from the 3rd line or so onwards), is about the upcoming concert Japonism. So Jun was talking about him not having any idea what to do for the concert. Not about himself being sad/pissed at the Ohno incident/whatever.
I also picked out some of the kanji used and did a little vocabulary list here.