family's

why do brother turn their back on you when they get married? or is it just mine? i thought my brothers was the best but they turn their back on me. i didnt do a thing wrong. but they just stop being their for me. but i did'nt stop being their for them. it not like i what to come first. i know their family come first. but i didnt even come second. i was not even last. it like i died. why why that all i what to know.