Sorry to hear that OP. I know how you feel - I lost my younger/only brother 4 yrs ago to suicide.Then a few months ago we buried my uncle from an overdose.
I'll admit, I hated everyone besides family & blamed myself for a few weeks after my brother's passing. Trust me though, soon you will come to your senses & realize that's not what he wants you to do. You will realize that even though its hard, life goes on & the world wont stop. You have to keep clean & living life , not just for him, but for your other loved ones. It will help you alot by just being their for your parents, because I'm sure they are going through it too.
I'll pray for you & your fam.
If you feel the need to get anything off you chest feel free to pm or ask me bruh.