This is NORMAL. SHow your hubby articles about baby development.. .and "separation anxiety."
Your Hubby has to "learn" NOT to take this personally. It is not your baby's fault and it is certainly NOT your fault.
Your Hubby needs to know, that any frustrations he has about it is about HIM.... and if he does not truly understand about baby development... he will/may start to "blame" you... and this is not good.
A baby cannot be "too attached" to Mommy... this is normal and Hubby should be glad and feel blessed that his baby son is developing normally. You cannot "force" a baby to just jump into someone else's arms all smiling. He is going through separation anxiety. It will pass.
Meanwhile, Hubby needs to know that this has NOTHING to do with "love" or your son "not" loving him. Your Hubby is the adult here... and he should not let his inability to understand get in the way of what your son is going through.
Just have your Hubby read up on baby development...it seems he does not know much. As your baby grows up... he will go through MANY other phases... and it's best if your Hubby is armed with knowledge and understanding of babies. Or he will suffer much frustration at his son and you. Perhaps.
My friend told me a story once, about an acquaintance's husband. They have an 8 month old baby... and her baby LOVES his little stuffed dog and plays with it's ears for "comfort" and goes to bed with it... it's his companion. Well, one day their son seemed to "reject" (in her Hubby's eyes) him... and was screaming for his stuffed dog and wouldn't listen to his Dad telling him to "come here." SO, in order to teach his baby a lesson and to show him some "discipline"... the Dad cut off the ears of the stuffed dog. YES, this is cruel! But to the Dad, he felt rejected that his son didn't "listen" to him or favor him over the stuffed toy. Naturally, this made the baby VERY unhappy and traumatized him. The Grandma tried to sew the ears back on... but the baby "knew" it was not the same. And in the end, the baby suffered for it... for the Dad's ignorant and selfish attitude.
When I heard this story, my heart ached for the little baby. How sad. But.. .some Men/Husbands/Dads cannot understand babies and their development... instead, they take it personally and then a "negative" relationship starts because of this....and it can go on throughout their growing up for hte rest of their lives. The Dad is the "adult" here... not the baby. So... it's very important for any Dad... to learn how to manage their insecurities about their baby... and how to handle it, if they are having problems with it.
This may be an extreme story and example... but, it does happen. I couldn't believe it when my friend told me about it. It's so sad.
All the best to your Hubby... help to "teach" your Hubby about your baby... and about development. Help him "grow" as a Dad....in spirit and knowledge.
Take care,
Susan