'Love on the Spectrum' Star Michael Theo Says Show Won't Get Third Season

Michael Theo might be breaking a lot of hearts with his announcements ... 'cause he says "Love on the Spectrum: Australia" won't be getting a third season -- and, he's off the dating market too!

We caught up with the star of the series -- which actually debuted before its American counterpart -- on our "Big Down Under" podcast ... and, he revealed he's dating someone new, but people won't see it play out on television 'cause the show's not coming back.

Theo doesn't give a reason for the cancelation ... but, he seems at peace with it -- frankly telling us that chapter of his life is closed now.

Besides, Michael adds, he wasn't ever in it for the fame -- he was looking for love ... and it certainly sounds like he's found it.

MT says he and this mystery person have been dating for about nine months after meeting through a work event ... but, he's kept the details close to the chest because he doesn't want his partner to face any negative backlash online.

We ask Michael how he and his GF navigate any issues that might come up ... and, ya gotta watch the clip to the end to hear it all -- pretty sage advice from this hopeless romantic.