What if the sense of loss, regret is so great that nothing can even cheer you up... Its always in the background. Unless some miracle happens i dont see a reason to continue
Feeling cheered up isn't really the goal of coping mechanisms. Basically, we cope to wait out the feeling and to reinforce the idea that we can hold on a little longer because we've come this far.
Coping skills that involve distractions and physically caring for yourself aren't to make you feel totally better, just a little bit more comfortable. It's about making the situation more tolerable, not about fixing it or thinking about fixing it, because that's a whole other mountain that can be put aside when we're at our most vulnerable.
All that's important is getting through the here and now.