What Touko said this chapter actually worries me a little bit. Touko's love is so conditional and to be able say she can't love her if those specific conditions are no longer met makes it seem that just maybe it isn't love in the first place. What if in the end she doesn't actually love her but instead is just a release, infatuation, lust, or something else that she is mistaken for love? It really is impossible to tell how things are going turn out with this story at this point.
In the beginning, it was never love that Touko had for Yuu, you're right. Her love, as revealed in chapter 10, was all based on conditions, self-gratification, & emotional-relief. But I do think that as the story progresses, Touko has been developing a rather personal bond with Yuu & I doubt there's been no growing feelings at all. It's interesting to compare this chapter to chapter 10. The same basic conditions to their relationship are reiterated, but unlike chapter 10 where Touko was willing to move on from Yuu, now she doesn't want to lose her. The only thing that hinders Touko from truly loving Yuu is her world view which is based on her own insecurities (lack of idenity and low self-esteem). If she is able to overcome this somehow, hopefully, she'll be able to open up herself to accept her own feelings & Yuu's as well.
But ofc, this is just me and my optimistic view on the story. Touko's love may just remain shallow till the very end & she'll never be able to overcome her own problems. If that's the case, then poor her & ofc Yuu too for having to experience such a shitty first love.
Tsk... you can't change someone. Anyone who has been in a relationship knows that.
They change on their own, over time, little by little. It may be because you're at their side, or you can accompany them, but they don't change because they saw the light.
It's only in manga that people change just because of a pep-talk.
I doubt Yuu will just change Touko on her own & that her plan will just work out smoothly. But what she's about to do can become a catalyst that helps Touko realize that she needs to change & she'll be the one to go through the change herself. If this manga ends on a happy note, we'll probably see Touko trying to rebuild her life anew. & even then, not everything is gonna be in place, but she'll have people around her to help her move on.