No, it doesn't make you a bad person. My mom doesn't consume my thoughts every moment of every day. And it's not even every day, that I think of her. It's random moments. Some more, a little recently than others. I know she'd understand and forgive me, if she knew. Makes those times, that I do think about her, all that more special, for me. Random memories. My most recent one, was combing out my hair today. Not a memory of her brushing my hair, when little, but a random wonderment about why she went to a super short cut, and her explanation of why, in a why mom, say it like that? Wondering more about how she minimized her own needs, sometimes. It started because she'd get up super early in the mornings, which was a change for her. I digress, it was a fond memory. Remembered in a unique/odd way, of her personality style.
It wasn't dwelling on missing her, just a random thought process about her, as I reflected on our differences, type of thing. It was a memory.