I was hoping to get more affection and attention from my girlfriend.
Do you think she is going to end up giving it to you?
Well, I decided to choose one girl who really loves me
While it is good that you think that she loves you, remember that she is not obligated to do what you want when you want. It could lead to fights if she doesn't want to but you want to force her.
I'm grateful for everything she does for me.
That is a great way to look at it! She will show you love when she wants to. Expecting her to always be in the mood to show you love is simply unrealistic.