I know I like her a lot, but I just don't know if I like her enough to make a lifelong commitment. I wonder if my romantic ideas are just Hollywood bullshit that doesn't happen in real life, and if I should be happy that I found somebody like her even if I don't feel like "oh my god she is my whole world" and that kind of stuff.
A wife deserves a husband who knows for certain that he wants to make a lifelong commitment.
A wife should be at least close to being your world. I mean, you can't give up your individuality to anyone, I don't care how much you love them. You must always maintain a sense of who you are. But, if you don't think you feel devoted to her and your relationship with her then DO NOT marry her.
I won't tell you that you don't care about her very deeply and that it may be a form of love, but it's not the profound kind of love that you need to feel for someone you very much want to marry.
What you mention are what most of us call red flags. If there are a lot of them, or very big ones, then marriage to this lady is not wise.