Samantha Lonely Without Lindsay

Samantha Ronson looked sad and lonely last night while out celebrating her birthday solo in Los Angeles.

The DJ had been spending time with her ex, incarcerated starlet Lindsay Lohan, in the time before she went to rehab, both in the sober house, and at Lynwood, which prompted rumors of a reconciliation between the two.

But now that Lindsay's at UCLA for the next few months, with only immediate family able to visit her, is Sam feeling sad and lonely?