I feel so bad for my baby and I don't know how to feel better.

I'm 30 weeks with my second baby girl. I have a 7 year old from my last relationship and am currently engaged to a different man. We bought a house together in July and I'm not really happy with my life in general. I feel so bad for my baby, I never sing to her, I have never read to her nor do I feel like I really love her. As I look into her nursery filled with all of the gifts from my baby shower, I feel empty. I feel blank. I don't know how to explain it. My fiance asks me if I love her and I don't answer or I mumble yes because that's what I'm supposed to say. I don't know why God chose me to have another child but I don't feel like I'm cut out for this. I love my older daughter so much but I don't recall feeling this empty inside while I was carrying her. Please tell me I'm not the only one who feels this way?