I'm going to continue to date her when I know she wants something more serious than I do
What's driving you to keep dating your girl?
It's certainly insecure of me to take ownership of her (or any woman for that matter), but then I wouldn't say she has good judgement either.
Being controlling is not a good idea, but leading your girl on in order to control her is worse. It is important that you not lie to yourself and to her and let her go.
Shut the fuck up. I am not controlling of her or anyone else.
You know that you don't want to get serious with her, so continuing this relationship is dishonest and wrong. Move on before she gets hurt by you.