Child only wants dad?

Anyone else’s child prefers their daddy most times? I love their bond but I have to admit it hurts at times when she pushes me away and don’t want me at all. I feel so unloved by my child sometimes😂😢 is there a reason for this? She’s 20 months old. We both started rubbing her back when she was laying down and she really pushes my hand off and keeps his 😂 she cuddles with him and gets excited with him or cries when he leaves. She does none of this with me. Says dada but not mama. 😢 could I be trying too hard?