There's no "love path" for Ian to pursue with Alison, not exactly. As it stands, he can one-sidedly catch fee-fees for her and it changes Alison's perspective on theoretical threesome with Jeremy (if it gets brought up at all) and who initiates the talk about moving in together. That's it, until about the most recent scene in the latest chapter, where she drops the line about not minding getting serious with him. Her route, if you could call it that, is wasted potential all around, lazy rehashing of old encounters and constant detours to contraceptive talk, which finally gets resolved with Ian succeeding the persuasion check and learning the power of pulling out. Lena never gets jealous (duh, because she's perfect, right) of Ian getting with her, they meet each other only once, very early on and it's entirely optional, and that is such a missed opportunity to have a solid shot at adding depth and fleshing out characters through a classic love triangle. There could have been a competition, even a fight between these two, but alas.