Feel like she thinks I don’t love her anymore

I have a one year old little girl and a one month old little boy. I’m a stay at home mom so for the whole year it was just me and my daughter. Of course the newborn requires more attention right now. But when I put him down to hold my daughter and show her attention he screams (colic baby) so I end up having to put her down to grab the baby. When I put her down she always cries and reaches for me and I just feel like she thinks I don’t love her anymore or something. It breaks my heart and makes me cry cuz I don’t want her to hate me. What can I do? Anyone ever been through this and it end up okay? Please help! 😢