I feel as if my girlfriend doesn't put me first like I do with her?

I am 16 years old and none of us drive yet. She went on a 2 week trip to the Bahamas and I know she would not cheat. I KNOW SHE WOULDN'T... But I had to bring up seeing her; after she hadn't seen me for 2 weeks, I would have expected her to bring it up. And she set our day to hang out a week later... I feel like I should talk to her about it, but whenever I bring something up to fix it, she says I don't appreciate her and gets upset. I don't know wtf to do...
I feel as if my girlfriend doesn't put me first like I do with her?
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