what do i do

my mum has been an alcholic for the best part of 20 years now, and things seem to be gettin really tough now it never really botherd me but just lately it semms to really of got to me, i find it really diffcult to talk about i just tendd to keep things to myself, we have tryd to get her some help but she just not having any of it, it is really gettin me down now.