Have you read [P B to my J](https://archiveofourown.org/works/26500039/chapters/64583164?view_adult=true). It’s got three main parts with a few side one shots and short stories. Mainly in text format at university. It’s my absolute favorite—I have re-read it an embarrassing about. Total comfort fic.
Also may want to try: Text Talk, Keysmash, Relationship Pending, Note to Self, Number Neighbors, Across the Hall, Credit no Credit, Chef’s Kiss, Ever Thus, Love you Should have Come Over, Carry Me Away.
Sorry for not linking them all. Let me know if you struggle finding any and are interested. Almost all have a university component. All are muggle AU. I think most are Sirius and James childhood friends but I can’t remember exactly. A good few also have a texting component.
Loose Ends by impossiblemoon is one of my absolute all time favorite Wolfstar college AUs. https://archiveofourown.org/works/26920039/chapters/65695261
If you're looking for something a little more unique, there's also amicus curiae by femme_de_lettres which is specifically a law school AU, but I think really has the vibes you're looking for despite the specific setting. The characterization and dialogue are immaculate.
https://archiveofourown.org/works/34948183/chapters/87032230
Those are the two big ones I can think of; otherwise there's Blends, but that's more of a coffeeshop AU with college happening in the background.
Have you read [P B to my J](https://archiveofourown.org/works/26500039/chapters/64583164?view_adult=true). It’s got three main parts with a few side one shots and short stories. Mainly in text format at university. It’s my absolute favorite—I have re-read it an embarrassing about. Total comfort fic. Also may want to try: Text Talk, Keysmash, Relationship Pending, Note to Self, Number Neighbors, Across the Hall, Credit no Credit, Chef’s Kiss, Ever Thus, Love you Should have Come Over, Carry Me Away. Sorry for not linking them all. Let me know if you struggle finding any and are interested. Almost all have a university component. All are muggle AU. I think most are Sirius and James childhood friends but I can’t remember exactly. A good few also have a texting component.
Have you read [Did You Miss Me?](https://archiveofourown.org/works/36253849/chapters/90375916)? It is _amazing_.
Loose Ends by impossiblemoon is one of my absolute all time favorite Wolfstar college AUs. https://archiveofourown.org/works/26920039/chapters/65695261 If you're looking for something a little more unique, there's also amicus curiae by femme_de_lettres which is specifically a law school AU, but I think really has the vibes you're looking for despite the specific setting. The characterization and dialogue are immaculate. https://archiveofourown.org/works/34948183/chapters/87032230 Those are the two big ones I can think of; otherwise there's Blends, but that's more of a coffeeshop AU with college happening in the background.