Jennifer Aniston’s romance with Jim Curtis has some of her closest friends worried. “Some of Jen’s friends aren’t totally sold on Jim yet,” a source exclusively told Page Six. “They worry he could be an opportunist and feel like he can come off a bit performative.” The “Friends” star, 57, and the 50-year-old hypnotist — whose work the actress had been following for years — sparked romance rumors in July 2025 after they were photographed enjoying an intimate vacation together on Spain’s Mallorca island. “Everybody adores Jen and just wants the best for her because she absolutely deserves the world,” the insider said. “At the end of the day,…