[It's definitely insecurity...but Lars is trying to at least seem less selfish with how he expresses it. Kind of...]

Are you seriously asking me if you're a bad friend? Come on, Sadie. [Lars rolls his eyes, shoving his hands into his pockets as he leads them closer to the boardwalk.] Ronaldo's just—a lot, it ain't your fault. If memory serves, even low-key stuff can be biting off more than you can chew, with that guy. Probably even for patient people.

[Ronaldo and Lars still have a lot in common.]