Yuuri on ice

Years later I’m still not sure if Yuuri and Viktor are actually a couple by the end of the series or not, so does anyone know if the author/director/whatever confirmed it?
I thought it was obvious that they are for so long but recently someone said that in fact the author/whatever confirmed that they are not together and that the rings thing is just a customary thing from Russia that friends do and it honestly broke my heart!! I thought they were like <<officially>> together. ╥﹏╥
So does anyone know?

Thank youuu and have a nice day!!