"Lindsay just feels safe with her," socialite – and Lohan friend – Cory Kennedy told PEOPLE at Billabong's 2nd Annual Design for Humanity Event Wednesday night in Hollywood. "I just feel like they have a very loyal and trustworthy relationship, which is really hard to come across in the world that Lindsay's in. It's a trust thing."
The DJ has been Lohan's constant companion during the past few weeks – they even enjoyed a recent family get-together with Ronson's mom, Ann Dexter-Jones, and Lohan's young sister Ali in New York City. The traveling duo also cozied up on Diddy's yacht during the Cannes Film Festival.
On Wednesday night, Lohan showed up at a G-Star party in Beverly Hills to support Ronson, who was spinning. After spending some together-time in the DJ booth, they headed for Ronson's next gig at the pre-party for a N.E.R.D. concert. (After Pharrell Williams's set, the two sat close together on a black leather couch – then made their joint exit around midnight.)
A 'Genuine' FriendshipDJ Steve Aoki, a close friend of both Lohan and Ronson, said their bond is easy to understand.
"[Samantha] truly is a friend to her," he explained. "She's a very positive influence .... [Lindsay] sees that and sees a genuine, good friendship."
"I think the most important thing in a relationship is, really, trust," agreed Kennedy. "I feel like that's what their relationship thrives on. I love the fact that they're both really happy."
Reporting by JESSICA HERNDON and KIMBERLY LANSING