Flajnik proposed to Robertson in the Bachelor season finale, which aired earlier this month.
Recent reports suggested that Robertson had moved from Santa Monica into Flajnik's San Francisco home after they were photographed unpacking boxes.
However, Robertson has now told Life & Style that she is not living with Flajnik yet.
"Ben and I have not moved in together," she said. "We helped his sister Julia move into a new place with her boyfriend. For now, we have a lot of fun trips planned, and see each other as often as possible."
Robertson recently revealed that she and Flajnik "love each other very much" but are "taking it slow".
> Read more coverage of The Bachelor