Before Robin and Leslie started going out, Robin went to her place just to talk to someone since both Ethan and Amber were pissed off at her. After saying she's unsure why Leslie even liked Robin in the first place, Leslie's response is to hug her.
Mike and Amber's functionally dysfunctional relationship is strangely endearing. Especially his proposal, which he made as horrifying as possible just so she'll leave him for somebody better. He even had to be nice!drunk to do it, because he was "too selfish and couldn't pull the trigger."
Mike:"Because I love her."
Amber:"Yeah, you doofus, I figured that one out a while ago."