updated 02/25/2010 AT 3:00 PM ET
•originally published 02/26/2010 AT 7:30 AM ET
After trips to London and Atlantic City, N.J., Lohan, 23, is back in Los Angeles, where she has been out late for three consecutive nights.
On Tuesday, the starlet arrived at Bardot Hollywood after 1 a.m., where her ex-girlfriend Samantha Ronson, 32, was deejaying. According to a source, Ronson asked security to stay by her side until Lohan left the club. “She wouldn’t leave, and at the end of the night, you could tell she was waiting for Sam,” the source says, noting that Lohan texted her ex, who ignored the message.
“They never talked at all, though, and Sam was definitely avoiding [her],” the source says.
A similar scene played out the night before – this time at Teddy’s inside the Hollywood Roosevelt Hotel, where Ronson was also deejaying. Lohan, who asked for a table near Ronson and was denied, was “a total mess,” a witness says. “She looked really drunk when she arrived and seemed so out of it,” the witness tells PEOPLE.
The actress was out again on Wednesday night, acting “aloof” at West Hollywood’s Chateau Marmont – though this time her ex-girlfriend wasn’t anywhere in sight.