"I started reading [the comments] and thought, maybe I need to make more of an effort and not go out in my UGGs and be disgusting," the Big Bang Theory star, 28, tells Cosmopolitan for its May cover story.
"So I started putting on makeup. And they started writing 'Wow, someone really likes being in front of the camera,' and 'Her hair's done now for coffee.' I couldn't do anything right. Why am I reading this stuff? But I'm obsessed. I openly admit to being totally insane about that."
The attention started when Cuoco Sweeting began a brief fling with Henry Cavill last summer, a coupling that ended quickly after foisting her into the spotlight and limiting her privacy.
Also a little crazy? Her subsequent whirlwind romance with pro tennis player Ryan Sweeting, to whom she became engaged after three months of dating, then married on New Year's Eve.
"I admit it happened fast, but that's who I am," explains Cuoco Sweeting. "When we met, I knew he was the one."
And so did everyone else who attended the couple's nuptials.
Eric Ray Davidson / Cosmopolitan
In attendance was Cuoco Sweeting's Big Bang costar and former boyfriend Johnny Galecki, with whom she remains close.
"It took a minute, a bit of awkwardness. By the grace of God, we became best buddies and moved on in such an elegant way," she says.
"[He's] one of my closest friends. He was in the front row at my wedding, with a huge smile on his face."