He told HollywoodNews.com that the character will continue to evolve in the forthcoming second season.
"Jeremy has been one of the most favourite characters I've ever played, just because he has gone through so much, and he has been forced to make so many changes," explained the actor. "You can only be hurt for so long before you turn hard. And that has been interesting to see his progression as the series has gone along."
However, McQueen - the grandson of Hollywood legend Steve McQueen - refused to confirm whether Jeremy will become a vampire in the new season.
"Obviously I can't say whether he makes that change or not," he teased. "But I can say that Jeremy has been pushed around a lot. [In the new season] he starts to push back and stand his ground. He also begins to become a little more cold and calculated."
The second season of The Vampire Diaries begins September 9 on the CW.