wee bit background - 4 years ago my DS2 was stillborn at 36 weeks, it happened 6 days before Christmas and I picked myself up and battled through for my DS1. Someone once described me as having acted as if I was OK for so long that eventually I was. I went on to have DS3 nearly exactly a year later and he is a lovely healthy little soul. I really did think I was doing OK until something happened 2 days ago that has well and truely floored me.
The little brother of one of DS1's classmates died in his sleep on Sunday night. He was 4 years old. I used to see the little boy with his mum and 2 sisters walking up to school every morning. I don't know the mum other than to smile and say hello to. I am completely and utterly devastated for the poor family. I feel I want to do something but I don't want to intrude as we don't know each other. DS1 (9) was taken out of class by his Headteacher who said to him that because he had been through something similar that she would like him to look after his classmate when she eventually returns to school - he had already said to us that he would do this and has asked if he can take flowers round to the family.
I feel entirely selfish because I can't stop thinking about it. I'm constantly close to tears and I can't concentrate on anything, I feel really lost, I feel like I'm right back where I was 4 years ago where I'm fighting to stay on track. When I feel as if I'm standing on the edge of a cliff and I can't let myself fall because if I do I'm not sure I will ever be able to pick myself back up again. I can't help but imagine what the poor family must be going through and I know it won't even be close to how they are feeling. This is such a horrible horrible thing to have happened and I feel as if its unfair for me to be so cut up by it because I didn't know the family or the little boy.
Is this because I've never dealt with my grief properly? Is this the catalyst that is going to make me face up to it? I feel so guilty about feeling like this when that poor family are going through this living nightmare.
What do I do? I'm just so lost 
I don't want to turn this round to be a "pity me" - thats not what I want at all, that is why I'm voicing how I feel here and not in RL. I need to say how I'm feeling though because I feel like I'm beginning to spiral into something I'm not going to be able to get myself out of.