Prior to this year Blur last performed as a foursome in 2002
Singer Damon Albarn has said there are no plans for Blur to perform together again following the band's successful series of summer reunion concerts.
"I think this is beautiful, what we've done, and I don't want to ruin it," he told the latest edition of Q magazine.
"With touring the repetition will come back," he added. "If we carried on the same problems would rear their head."
Earlier this week bassist Alex James said the group had not talked about "doing anything else whatsoever".
Blur's comeback gigs included performances at London's Hyde Park, T in the Park in Scotland and the Glastonbury Festival.
Albarn said Blur's Glastonbury set had been "truly ecstatic". "When I die that will be the one moment that will flash before me," he added.
Despite this, however, the 41-year-old - currently working on the third Gorillaz album - said "cynicism" would return if he and his fellow bandmates remained together.
"I just can't do it any more," he said, adding that his main motivation had been to reconcile with guitarist Graham Coxon.
"What I wanted to do was heal to the point where I know I can always ring Graham up in the future and it will be fine.
"That's all I wanted to do and we've done that, definitely."
Coxon, who performed solo in London this week as part of the iTunes Live Festival, has also singled out Glastonbury as the highlight of Blur's recent run of gigs.
"Glastonbury seemed to have a crazy magic to it," he told 6 Music. "We weren't expecting to get that sort of insane affection."