What does my nightmare mean? PLs help!! This is killing me.?

I've been having this nightmare for like 3 weeks every night after I have some random dreams and every time I close my eyes I see this.There this poor little boy who's hugging me really tight and he loved me so much.Actually he was carrying me as a baby.I was 1 year old I guess and then he just puts me down and says "I'm gonna go somewhere now so don't cry ok lil' sister?" and then he goes somewhere and doesn't come back.And I get up and start calling out to him saying "brother where are you? where did you go? aren't you coming back to hug me again?" and I start walking trying to find him.Oh and forgot to mention that he's about 5 or 6 years old.And then suddenly I see two people tied him up to a tree and beating him up sooooo bad.He has cuts and he's bleeding like hell.I start crying sooo bad and see that he can't talk.I see tears rolling down from his eyes but he can't call out my name and I keep on crying.That's when I wake up every night crying like mad and evr moment i tink abt it