Keep in mind you need Ian to have enough of the right stat to be able to overpower her.> Ian needs to have a relationship with Lena, it doesn't matter if in the end you decide to choose Holly;
> You have to choose "make a joke" on Ian's first contact with her and say that her dancing was hot in the episode where you go to the party with Perry, Alison, Emma etc;
> When Axel confronts you about Lena, you have to speak the truth;
> You have to choose to go to the gym, if I'm not mistaken, that choice is in episode 10 (I think).
Unless you want her to be on top for the struggle-snuggle at the gym.