daddy disconnect?

Da
First time mother to a 6 week old boy. My husband and I tried to get pregnant for 19 months and when we finally conceived we were both over the moon. My heart could not be any more full with this baby boy. I worry though that my husband may feel disconnected. He is working full time and is  in an intensive graduate school program keeping him very busy. Sometimes it seems as though he may be too busy for us. He often makes comments that our son doesn't like him, that baby screams when ever he holds him. He sometimes doesn't even try to hold him. My husband is very sensitive and takes things very personally. I am trying to figure out the best way to approach this as I don't want to make him feel worse but at the same time I worry that he's just giving up, not to mention I at times feel so alone. This is very hard for me to talk about so I think I just needed a forum to share my worries. Thanks for listening!