Trouble in paradise already?

Bill de Blasio’s new flame apparently can’t get enough of the former New York City mayor — to the point where his friends fear she’s “stalking” him, a source tells The Post.

South Tucson Mayor Roxanna Valenzuela was recently outed as de Blasio’s latest fling, which allegedly blew up his 10-month relationship with progressive activist Nomiki Konst.

Roxanna Valenzuela/Instagram

“What’s happening with Bill, and now that it’s out and people close are concerned, it’s like a mental episode he’s having, to be honest,” one source close to the situation said.

To make matters worse, the budding courtship is apparently on the rocks — but Valenzuela seemingly never got the memo, and has been “stalking” him — even following de Blasio to the Big Apple recently,

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