Nope, every girl has certain preferences, we have yet to see what's gonna be like in the long run, we are only at episode 3 but you should have a certain behavior to have a relationship with a girl you like.
For example Bella has some crucial hidden points (you see that in the WT): if you beat Troy (your roomate in ep1 - major DIK choice) you'll fight with him in the caffeteria in ep3 and she's not gonna like it; if you have bad grades she's not gonna like it, aka you'll lose those points, lose too many points included her regular ones and you won't progress romantically with her anymore.