After a close cousin's death... I wrote her letters everyday.

The last letter was two and half years ago. I think I finally learn to love. Love her enough to understand that love itself equals an ending, and it was preparing our hearts for reality.
It's good that you are facing your emotions. That in itself is the process of grieving... and you are grieving... and in grieving, we learn to just...be.

I've always thought...the more the deceased love someone, that person will not dream or receive any omen from the deceased until the person they love heal. So that when they meet, it will be out of pure love, and nothing else. Or if they meet in dreams, the person's spirit won't follow. At least... I've noticed that.

When my cousin passed away, I didn't see her in my dreams for a long time... I think after I learn to love and learn just be... she came to my dreams... But I still chased her, and I remember she shook her head in the dream and ran from me. My grandpa passed away recently... and all of has dreamed of him... except grandma who often cries and calls out for him to come get her, too.
Maybe your brother's waiting... waiting patiently for your heart to heal before he sends you an omen...