Like Tanith I don’t find it upsetting either, as Esspee says, he was such a part of your life it is only natural he should be in your dreams, as you say like he is still here. My DH died nearly 3 years ago and nobody can fully prepare you for what you are experiencing. I would have gone with him in a heartbeat, but now I feel he would want me to go on as a mother and grandmother of the children he loved.
Let nobody tell you it is anything but very hard but there are many on GN in your position and we are always here to support or provide what comfort we can.
Sincere sympathy 