My girlfriend is not emotionally open to me in our relationship. What should I do?

Me (18 ) and my girlfriend (18 ) have been dating for almost a year now and over time we have started fighting more and now she is hyper independent and doesn't like to tell me anything about how she feels. When I try talking to her about it she says she has already tried a lot and doesn't want to change anymore in any way. I have also suggested therapy but she doesn't want to go. I do realise that I have been an unsafe person to share feelings with and have sometimes reacted badly which has contributed to this but I want to fix it and she says that she can't fix and will never open up to anyone... I'm lost and I don't know what to do. Obviously emotional intimacy means a lot to me... what can I do?
My girlfriend is not emotionally open to me in our relationship. What should I do?
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