let me throw some ideas at you that i had! an unlikely housemate because rese doesn't need a housemate but just wants one because it's too quiet by herself, a fling that's for the most part casual except for when rese (also selfishly) drags him out for dates because she likes dressing up and going out, a neighbor whose mail she keeps getting and vice versa and it's always the most embarrassing things they keep having to exchange, an ex she's a little hung up on still but she's doing her best to be cool especially if there's still something there on both sides for extra complications, someone who was kind enough to save some of her dignity once when she was stood up at a really nice restaurant and he came and sat with her/pretended he was the date right when she was totally about to start bawling at her table!