Don't know what to do - just want this to end

Hi,
This disease has ruined my life - and I just want to give up..
I have PPMS. Plus no active lesions.
I've been advised there's no DMT that would help and it's only getting worse. My mobility is decreasing and I am aware there's no cure or any respite possible.
What can I do? I've really just had enough and nobody hears me,