Ron's family lived on the other side of the village. Wishing to distance himself as much as possible from his family, Pro-Resistance and Pro-Regime members alike, he built a house in Hogsmeade when he married and it was no longer appropriate to continue living in Rabastan's manor. Despite being in the same village for over fifteen years, there were few occasions where the Dolohovs encountered the Weasleys. If they weren't Sorted into the same House, their boys likely would've continued to be practical strangers.