He romped with another woman to Atlantic City and dropped $1,200 on a stripper — but it was coldhearted Facebook lawyers who really killed his relationship, an alleged Brooklyn huckster says in court papers.

Flashy financier wannabe Martin Grunin, 23, says in a federal filing that the $1.4 million claim against him for a fraudulent advertising scheme drove off his squeeze of nine years — and he deserves a break.

“Facebook has already damaged Martin Grunin’s business relationships, caused him financial hardships and a loss of a nine-year relationship with his girlfriend,” court papers said.