My 5 month old favors grandma more than mommy 😔💔

Lately I’ve noticed that my daughter would rather be with my mom than me.. and it breaks my heart every time and I’m even beginning to feel jealous. For example, I’ll be holding my daughter and she’ll turn her head just to look for my mom. And she even smiles at my mom more than she does with me now. I’ll try to make her laugh but she’ll just stare at me. My mom doesn’t even have to try and she’ll giggle and smile. Am I doing something wrong? How can I change this? I feel so hurt 😞