Concerning her boyfriend, Ayu-Love is right, she mentioned at that Dejavu Release event back in March that she is dating someone and she makes sometimes little comments like in KO-SO-KO-SO PV making of, that makes me think she has a boyfriend.
Nothing absolutely sure though, she keeps it private pretty well.
I worded it badly maybe, sorry, should have said: maybe it's her current boyfriend, as we assume she has one.
Ai wo tomenaide is doing great on recochoku, weekly #1 again (thanks re'nai) and #1 on Chaku Uta full, Videoclips, movie clips and RBT and on #2 on Chaku Uta today!
Kuu debuts at #5 with Ai wo tomenaide on Oricon.
#3 sold about 17k, so a pretty low first day.
http://www.oricon.co.jp/rank/js/d/2011-09-20/