Am i being unreasonable?

Of course you're not being unreasonable. How you feel is how you feel and other people dismissing your feelings are not going to make them change or go away. You need to sit down with your partner and just tell him how you feel and tell him how you feel he's being insensitive. A lot of times men grieve in private- they act like nothing is wrong. You're going to go through 5 stages of grief for your son and I would suggest seeing a counselor to help get through them all - you don't need to get through them fast by any means but talking to someone who is basically a professional listener helps A LOT. You may want to get your partner involved in dual sessions, it may help him to understand how you express your feelings and help him to express his. I'm so sorry for your loss.