Britney Spears has declared that she’s “single as f—” after taking to social media to call out her boyfriend Paul Richard Soliz’s behavior, RadarOnline.com has learned. The Toxic singer posted a paparazzi photo of Soliz driving her, snapped after she settled her conservatorship case against her father in April, with a message calling out her now-former flame via Instagram Stories. “Why was he going 90 in a neighborhood with one pap following only to roll the window down when the pap pulls to the side of me ????” she asked, Page Six reported. “Then he calls his mom and says he’s being harasse…