Mischa BartonThe OC’s Mischa Barton has apparently split up from boyfriend Cisco Adler again.

The Daily Star is reporting that Mischa was sick of Cisco complaining that she was partying too much and spent too much time with close friend Nicole Richie instead of with him. She apparently dumped him after an argument at the Beverly Hills hotel in Los Angeles.

Meanwhile friends of the pair suggest it’s more the pressure of being in the public eye that’s caused the part: they’ve found it difficult to maintain a relationship with all the intense public interest in it.