I have a problem

So my ex and I broke up years ago! We were young and dumb, but the distance got to us and we broke it off. There were no hard feelings and we were still best friends. I know the biggest reason there was no hard feelings was because we've known each other since the first day of kindergarten, so we know that trying to date wouldn't change us. Well years later, we both move on. I have a boyfriend and a baby, he has a girlfriend with a kid. They broke it off, because she went crazy. He started giving my baby the other kids toys (that he bought of course). I seen him recently and I've noticed he is so well with my baby. She took to him faster than she does any stranger. I left them alone to talk to my mom, and I heard her giggling. I peek in and he's in the floor stacking her toys and letting her knock it down and they're both laughing. He's so well with her! Then I realized something, he's better with her than her own father. He's always on his phone, barley plays with her. I'm the one in the floor playing with her 99.9% of the time. But him? He's on the couch in the living room playing his game or on his phone. It's like she's here but doesn't exist to him. I change her diapers, I change her clothes, I give her baths, I do literally everything, and he's on the phone. When I ask him to help he goes "ugh fine", so I say never mind and take over. Or when I say he never helps he says "you never ask". I'm not supposed to ask him to help with his own flesh and blood! But my "ex", he helped out without me asking. He watched her and played with her while I talked to my mom about an art set he was giving me. He's so well with her, I almost cried. By am I a bad person? I choose my "ex" over my boyfriends parenting. My ex didn't even parent his exs kid long, it's like he's a natural. I feel bad for thinking it, but seeing it, it's just true. What do I do? How to I explain to my boyfriend that I shouldn't have to ask for help, that he should help without me questening him. Also, please don't judge, I'm asking for help, not for you lecture me about how you can't be friends with your ex and blah. I'll delete the rude ones.