What should i do in this situation?

okay well i have a stepmom and a stepbrother, and i found out today that my stepmom wants to divorce my dad. and my stepbrother is seriously like my brother. i love him so much, and i would miss him terribly if i never got to see him again... if they get divorced does this mean i cant go around my stepbrother anymore? like would it be weird if i did? ahh. ): ):