Fics like A Forgone Conclusion

When one of their classmates asks him out, Phineas kindly tells her that he's flattered but he already has a girlfriend. This is...news to Ferb.

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1. This is about a girl, isn't it? by MissMarlot (Phineas and Ferb)
2. Give Me Something To Cry About by IronicAppreciation (Phineas and Ferb)
3. Fletcher Antiques and Restoration by KissingLizard (Phineas and Ferb)
4. On the Rooftop by LigerCat (Phineas and Ferb)
5. well, i wanna go back (but i'm halfway to the place where we will meet) by flibbertygigget (Phineas and Ferb)
6. Let's all assume the worst by KissingLizard (Phineas and Ferb)
7. Maybe He's Just Taciturn by BlackEyedGirl (Phineas and Ferb)
8. Aren't you a little grimdark to be in a Disney crossover? by Masterweaver (Parahumans Series - Wildbow, Phineas and Ferb)
9. To Know Where the Light Comes From by wordsmith_kari (Phineas and Ferb)
10. What's She Doing Here? by kittyhazelnut (Phineas and Ferb)
11. A First Meeting by Winter_S_Jameson (Phineas and Ferb)
12. Be Right There by orphan_account (Phineas and Ferb)
13. What Does Busting Mean? by agoldengalaxy (Phineas and Ferb)
14. I'll Be Honest With You by KissingLizard (Phineas and Ferb)
15. The Stuff of Legend by Rehearsal_Dweller (Phineas and Ferb)
16. Mixed Messages by DBL_MP1 (Phineas and Ferb)
17. Following Perry by MortalAnonymous (Phineas and Ferb)
18. Boyfriend Material by Chaos_Valkyrie (Phineas and Ferb)
19. forget-me-not (Phineas and Ferb)
20. A Platypus Habitat by KissingLizard (Phineas and Ferb)