The British star, who began dating his TV colleague in 2008, split from Szohr in April (10) but the pair has faced constant speculation they have rekindled their romance.
Reunion rumours were further fuelled when Westwick was photographed kissing and cuddling the actress in the crowd at a tennis match in New York last Wednesday (01Sep10).
But the 23 year old insists he is still a bachelor because he has no time to date.
He tells Britain's Closer magazine, "I'm single! My English accent drives American girls crazy but I haven't got time for romance. I've always been in love with Rachel Weisz, but sadly she's taken."