The 36-year-old star reunited with his old band earlier this year for the first time in over a decade and admitted he hasn't set a date to go back to his solo career.
Speaking to Sky News, he said: 'I haven't put a time limit on it, I have no 'this is what's happening and this is what's going to happen'.
'I'm along for the ride, there's just an awful lot of giggling going on and if the giggles carry on them I'm staying.'
The band recently held a press conference in London to announce the dates for their new tour and Williams said they won't be going to Glastonbury in 2011 during a gap in their shows.
He said: 'It's cold and it's muddy, no! Don't fancy it at all!'
Williams also spoke about his return to the band and said he loved what they were doing and wanted to be part of it.
He said: 'Gaz was out in LA and he brought the DVD out and he's like: 'It's alright, you only have to watch a couple of the songs.' I was like: 'No!' I was transfixed for the whole of the show, dancing along, singing every word.
'And I was like: 'Oh my God, I need to be in this.''