Fight in a relationship?

Me and my girlfriend kinda argue a lot. Always i am the one who goes to her when we ended fighting. Is it normal? I mean i never had serious relationship before her so i dont know how it works but i suspect she should come to me some time, right? Why she never does that? Does it means she doesn't love me or care about me?
I have told her plenty of times that i would appreciate if she would come to me too but still, she does nothing.
And another thing i have noticed throughout this 2 years that she doesnr say your welcome when i thank her something. She remains silent. Why?

Am i just overriacting?

Send help, opinion or experience please i can't take this anymore.
Fight in a relationship?
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