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The New Zealand-born scrum-half acknowledges the fact that he is in the twilight of his career but insists he has plenty left in the tank. And he hopes a triumph on Saturday can open the door to further Ireland honours. Boss won his last cap against Samoa last November.
"I love it every day, getting out there and getting paid to do what I love," Boss told the Irish Independent.
"The next few weeks are important too - if I can get game time in these big matches and play well in them maybe it will prove something and that won't go amiss.
"I'm really disappointed that I'm not in that frame with the Irish team. But that's just the way it goes. All I can do is try and change the man's (Ireland coach Declan Kidney) opinion with on-the-field tactics.
"You don't really know what they're thinking so we'll just have to wait and see. Every player has a different sort of approach but I've always found it tough talking to coaches and saying what you want to say. I always think your actions have got to speak louder than your words.
"I hope that ship hasn't sailed but it does get demoralising after a while. But the day to day is still my core and I thouroughly enjoy playing for Leinster."
Boss has only started two of Leinster's eight European games this season with fellow Ireland scrum-half Eoin Reddan handed the number nine jersey on the other six occasions.
Although frustrating, Boss maintains the competition has been beneficial.
"It's frustrating because we both want to be playing more," added Boss.
"It's good when you do get in for a big game but then the next week you're disappointed again so it's a bit of a rollercoaster. I'm competing here week in week out with Reddan and Paulie O'Donohoe."
Boss' career may be nearing it's end but he has no intentions of hanging up his boots and hopes to sign a new contract with Leinster when his current deal expires at the end of next season.
"My only regret is that I didn't come earlier. I actually had the opportunity to come to Leinster, when Matt Williams was there in 03-04, but at the time I still had a couple of things to do on my degree (in management studies) and I thought I'd get that behind me first.
"Maybe I should have come to Leinster and burst onto the Irish scene and it could have been different. But hopefully I've got a few more years left in me yet.
"When I'm finished, if my body is okay, I'll still be playing somewhere in some club, whether it's just with a few mates or whatever. There was an old fella when I was growing up and he was still there in his 60s, still playing. Still full-on tackling and that sort of stuff, in one of the reserve sides in Tokorua. He was a bit of a legend to the boys. I used to think: 'Jeez, I hope someday that'll be me out there'. Hopefully you will have sons that you might have the chance to play with. It's a nice thing."
