If you're interested in a Heated Rivalry fic where Shane has a lesbian best friend, may I suggest my fic Shane's (Ex) Girlfriend.
Shane's high school girlfriend Jessica (mentioned briefly in canon) shows up at his door in Montreal after being kicked out by her parents for coming out as gay. Obviously, being Shane, he invites her to stay with him. But heteronormativity intervenes, and soon his teammates assume he has a girlfriend. With no better option, he asks Jessica to pretend to be his date for a night. However, it spirals from there when the media (and then Yuna) gets involved.
Featuring: Shane having a safe space, fake dating, a brief social media interlude, the WAGs, and Ilya being angry (but not jealous, oh no, definitely not jealous) and slightly pathetic
https://archiveofourown.org/works/84819726
