The veteran Scotland fullback's contract is running down this season.
Robertson was expected to be on the move this summer, but after Liverpool blocked a switch to Tottenham in January, it's suggested Reds management could offer him a new deal.
"Will I make a decision before the World Cup? Yeah, that will definitely happen," said Robertson, who will captain Scotland against Japan at Hampden on Saturday.
"For me, I will make up my mind before the summer and it’s always been in my head that I don’t want it hanging over me.
"I think that’s important, I don’t think anyone wants that and everyone would be in the same boat.
"If you’re out of contract and sign a new contract, or whatever you’re doing - you always want that sorted before you go into a big tournament.
"I have always worked towards and have been consistent with. It’s only eight or nine weeks, so from now until the end I’ll sit down with my family and see what we want."
Asked about a return to Celtic, he continued: "It’s not really one to talk about. Obviously I was at Celtic as a kid and had a season ticket, that’s not a secret.
"But it’s not something I really want to get into. The options that are on the table for me at the minute will stay private and that’s the way I’ve always done it.
"People can talk and there’s been a lot of talk around it, where I’m going to go next. I’ve seen it but I stay away from it all now."