A proposal in Switzerland wasn't enough to keep The Bachelor's Ben Flajnik and Courtney Robertson together -- but they're on the road back.

The couple's relationship quickly went downhill once filming ended and Flajnik tuned in to watch their love blossom on national television. "The woman that I saw on TV isn't the Courtney that I know," Flajnik told host Chris Harrison on last night's After the Final Rose special.

He added, "Those are the moments and the instances that led to Courtney and I not talking for a time while the show aired. We were essentially broken up."

Robertson accepts responsibility for the couple's demise, but laid much of the blame on the show itself. "It's a really hard situation living in a house with 25 women all dating the same guy," she said. "It's just a very unnatural situation to be in, and it brought out the worst in me."

She opened up about the devastating effects the show had on their relationship, including a loveless Valentine's Day. "He didn't send flowers or a card or anything," Robertson revealed. "It was awful. There were days where I didn't leave the house, and I just laid there and cried ... He abandoned me. I gave (him) space and I was trying to be as understanding as possible, but I needed him."

Though Us Weekly photographed Flajnik stepping out with three women in one weekend in February -- and locking lips with two of them -- he says rumors of other ladies were nothing but "tabloid fodder."

"On my father's grave, I haven't kissed another woman," he said. "I haven't hooked up with another woman. I haven't cheated on Courtney. None of that. Those are friends from San Francisco. Those are past photos."

Despite all the drama and turmoil, the after-show ended with Flajnik slipping the ring back on Robertson's finger. With their engagement back on track, the couple is hoping for the best. "Now that the main part of the show and all the negativity is gone, it can only get better," Flajnik said. "The root of the problem was us not being able to be with each other and talk about these things."

Tags: The Bachelor