There is no formula in relationships. They have to be negotiated in loving ways, with room for both parties, what they want and what they need, what they can do and what their life is like.
In business, people negotiate to win. They negotiate to get what they want. Maybe you're too used to that.
Love is different. Love is when you are as concerned about someone else's situation as you are about your own. You've had these special times with your brother, and you no longer have what you had with him. You want them back. You never want them to stop. But that's part of being human. Stop, renew, stop, renew. You'll find a way back to your brother.
How do you know?
You found me, didn't you?