[Someone1234]

> Main problem is that she still depends on me financially. Am I a bad person if I keep pretending for a couple of years until she finishes her studies, gets a good job and then break up? (she is also a software dev, she is already working but earns a pretty low salary)

Those aren't the only two options. You could both agree to support her financially AND move on.

I would suggest you should be having these conversations with her, even if just to give her a heads up that you're feeling this way so when you decide to make a change it isn't completely out of the blue.

> One strategy I used was to tell her that I don't want to have kids, and I told her it was ok if she left me.

This isn't a "strategy." This is just not dealing with the problem and trying to push her into doing it for you.

You two need counseling, even if only as a nicer way to let her know you're one foot out the door already. If you want to support her after your married dissolves then try to do arbitration and offer that.