I plan on proposing to my fiance but I'm not going to get her family involved.
That seems kind of rude. Do you dislike them?
Not exactly, I don't like the person who is supposed to propose for me and I don't like his family.
I understand that some traditions might not be for you, still, you should try to include your fiance's family involved.
Actually I don't care about any of that. Marrying my girlfriend is enough for me.
I would really take a step back and consider that this may really upset your girlfriend. You should include the family to make your girlfriend happy and a memorable night for her.