I feel your pain.
I lost my twin brother almost 13 years ago.
I didn't celebrate our birthday for 11 years. I mean, really? Who wants to hear the words, "Happy Birthday" when it's far from happy?
It still hurts a lot.
I wrote and published my memoir... a lot about the details around his death.
Beside Myself- Recovery From My Family Betrayal and Estrangement.
There is no timetable to grief.
I was the regional director for the Twinless Twins Support Group International for those of us who've lost our twin.
Check it out. There is a branch in England.