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Ireland's captain missed the narrow home defeat to France in the second round of the Six Nations having suffered a head injury during his team's opening loss to Wales.
However, Sexton is fit to return to action as Andy Farrell's side aim to finally get off the mark in this year's tournament when they take on Italy on Saturday at the Stadio Olimpico.
The 35 year-old raised questions over his career plans when he recently suggested he "might not" be around for the 2023 Rugby World Cup, though later clarified that was a "throwaway comment".
While already contemplating what may come in the next chapter of his life, Sexton remains as committed as ever to the game he loves.
"You never tell anyone your plans because they can change, can't they?" Sexton said.
"I've some things to work towards, whether it's over the next year or two years, I don't know. I'll work towards getting into the real world and starting another life.
"There are some parts of this game that are amazing and you love – you'd love to be part of it forever. There are other parts, though, that you just can't wait to get a million miles away from.
"I love it at the moment, I'm loving every moment of playing and I just want to focus on this campaign.
"If I stay on next year, I will try to make the most of that, just try to make the most of whatever is left."
Sexton is under contract until the end of the campaign but has held negotiations about an extension for 2022, which will be a year out from the next World Cup on French soil.
Asked if a new deal was close, he replied: "Nearly, nearly. I'm waiting on Leinster to see if they want to keep me or not. They have got a few good number 10s coming through!"
Ireland lost 21-16 to Wales after playing the majority of the match a man down after the red card for Peter O’Mahoney, while they were squeezed out 15-13 by Les Bleus last time out.
"I don't think we've lost our confidence as a group. The start of the campaign has been a million miles off what we wanted, which was two wins from two," Sexton said on morale within the squad.
"But we took a lot of confidence from the Wales game with 14 men, in terms of the chances we created. The hard part in international rugby is creating chances – we've done plenty of that, we need to now go and take the next step and finish them off.
"I don't think this group is low on confidence, we are all looking forward to finishing this campaign on a high."