Erin is your best friend. She actually provides you pretty much everything you would want from a girlfriend except physical intamacy. She's into women. You love her as a friend. Last year you guys moved in together. Separate rooms. The amount of women she brings by is staggering. They never last more than a few weeks but with almost no downtime in between.
Sydney has known you her whole life. She has had a huge crush on you for years. She would and will always do anything to make you happy. It brings her genuine joy to serve you.