Hello, Maddie! First of all, don't worry, you're not being stupid. It's a legitimate concern because your response to the problem could affect you greatly. And hey, even if it didn't, it still matters to you, and things that matter to you deserve to be respected.
You need to communicate with your girlfriend and be on the same page. Does she think of the relationship the same way you do? Is she aware that you're unhappy and that you want more from her? And, most importantly, does she feel the same way about you as you do about her?
The truth about relationships is, you enter into a relationship because you're already happy and you want to share that happiness with someone. Not because you need one to be happy. And in order for it to be a good, happy, healthy relationship, there must be mutual respect and trust, equal feelings, and good communication. It's not a good idea to be in a relationship with someone if you're lacking any one of these qualities.
Once you communicate, you need to evaluate the relationship. Does she love you as much as you love her and consider you "the one"? Can you both communicate well (as in, she is understanding, kind, and respectful to you and your points of you, and you are the same to her)? Do you both love and trust each other equally? And are you both willing to adapt and sacrifice equally to ensure you both feel happy?
If you answer no to any of these questions, you need to consider that she may not actually be the one for you. It's hard when you love someone, but you deserve to be loved back just as much and treated with respect and care. No one should get to write on your heart in permanent marker but only let you write on theirs in pencil.
If you answer yes to all of them, then you both need to communicate better. She needs to understand what particular qualities of a relationship you need in order to feel safe and comfortable in a relationship.