My relationship feels onesided?

My girlfriend seems to have more fun with others than with me as of recent. She pushes meetups back one hour, then two hours, then three hours. She seems angry with me 90% of the time.
I put a lot into this relationship, but i just feel like i get so much less out of it. We are together for a year now and she blocks any attempt at me getting cuddly and or sexual.
What am i doing wrong?
My relationship feels onesided?
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