Shouldn't relationships be equal? 50/50?

Recently my girlfriend and I have had problems. Basically I don't show affection when she's not being kind which is almost all the time now. She says she's not affectionate enough to show it to me. She will only come to my house and stay if it was the last option. It sucks cause I stayed by her side when she was homeless when I had a home with water and power. She couldn't stay to due landlord issues but still, shit on my place. Won't meet me halfway for nothing. It hurts knowing she wouldn't do 1/3 of the things I do for her. Are men supposed to carry this much weight and be happy? I told her it's like igniting her flame and letting mine die.
Shouldn't relationships be equal? 50/50?
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