i am not the best one to speak to this, but will add what i can.
i had a friend whose older brothers were early perps. he desperately wanted to have a good relationship with them based upon truth. he wished more than anything that they had admitted the wrong they had done him, the hurt they had caused, and to have them ask for forgiveness. he would have responded positively.
of course, no one but your brother can say how he feels and how he would respond to your attempt at reconciliation. however, it may be that you need to apologize and express your regret to him, regardless of the outcome, for the sake of your own peace of mind. then it will be up to him whether he responds as you hope.
i encourage you to try and hope for the best. it could be a step of healing for both of you.
"My experience has shown me that I all too often tend to deny that which lies behind, but as I still believe, that which is denied cannot be healed." Brennan Manning, "All is Grace - A Ragamuffin Memoir"