The `Mamma Mia` actress had been casually dating real estate broker Justin Huchel for a few weeks but the pair have now called time on their relationship.
According to the New York Daily News newspaper, Justin - who is friends with Amanda`s `In Time` co-star Justin Timberlake - ended the romance as he didn`t think it was going anywhere.
At the end of last year, Amanda - who has previously dated Ryan Phillippe and Dominic Cooper - splitfrom real estate executive Andrew Joblon after four months of dating.
A source said shortly afterwards: "They`re definitely over. He celebrated New Year`s Eve in Aspen and she wasn`t there!"
"[The split] happened gradually over time. They still talk. They aren`t what they were, but they still hang out and are on great terms."
Amanda began dating Andrew, 28, a few months after she splitfrom `Lincoln Lawyer` star Ryan, 37.
The 26-year-old actress recently claimed she doesn`t have the "energy" to be in a relationship and was happy being single.
She said: "Although I think it`s easier to be in a relationship than be single, I just don`t know if I have the energy at the moment. In the past, whenever a relationship of mine ended, my friends would tell me to be single for a while - that it would be good for me.
"You don`t have to check in with anybody except your mother, and there`s all this freedom. You realise how many pressures come from being with someone."