Not sure why I'm feeling the way I do

I've (37m) been dating the most amazing woman I've ever met. I'm so used to previous relationships where I give and they take. But this one is different. She compliments me all the time. She wants to hear about my stresses and problems so she can see if she can help. When we go out to eat, she will have me try what she got and feed it to me. When I open the car door for her, she'll reach across and open my door for me. I've never been treated so well before. I absolutely love it, but at the same time I almost feel like I don't deserve to be treated this well. And that's my issue.