A New York City lawyer was arrested Friday and charged with relentlessly cyberstalking a woman he met through an online dating service, including allegedly making false claims about her to her employer and on public blogs.

Manhattan lawyer David Waldman was charged with cyberstalking and sending interstate threats. He faces up to 10 years in prison.

Manhattan federal prosecutors say Waldman and the unidentified woman dated for just four months in 2014. He then stalked her for four years through “hundreds” of creepy text messages, e-mails and public blog posts, feds said.

“I only hope you don’t die of cervical cancer before i can f–k up your s–t,” he allegedly wrote in one blog post, and e-mailed the woman’s boss to say she is a “habitual drug user,” papers state.

Waldman was held without bail Friday after knives, lock-picking tools and a diary with his victim’s initials on it were allegedly found at his home. His lawyer didn’t return calls for comment.