That's... very much subject to interpretation, because in both cases (hard/gentle) Lily clearly shows signs of falling for MC, she just handles it differently. IMO, you have to keep in mind that she doesn't want to fall in love, at all.
If you went hard, you respected "the contract", she's not upset at you but at herself because she knows she's falling for MC, but not because you keep trying and pushing in that direction... On the other hand, if you went gentle it does appear to be even worse, you didn't respect the contract here, she's falling all the same for you but since you were too gentle and caring we might think that it's your fault for forcing your way into her heart, far from "rolling", here she's upset AT you, leaving without a word.
To be honest, I think that choice won't really matter in the end, we might see some dialog differences in the future but I don't think it will determine whether or not you can pursue Lily in the future, "want(ing) more with her" will be the key in my opinion, she's falling for the MC, period.