I can really sympathise with you. I lost my wife to a brain haemorrhage just over six months ago and I have also been going through a particularly bad patch since the six month anniversary. I had blocked out the time o hospital, still have to an extent, but even happy memories come with tears.
We have to remember that these bad patches are just that, patches, and that there will be periods that we are more able to cope with our new situation. Hopefully these periods will become more frequent with the passage of time even though we might not be able to see it now.
Until then it's down to getting through one day at a time as best we can