@topcat2014 I'm so sorry to hear of your loss and the situation in which you now find yourself. I'm glad that the support and advice you are receiving on this board are helping you, especially as you say that your real life family and friends are struggling to know what to say or how to be around you,
I haven't really got anything to add to all the excellent advice you have received up thread, but I wondered
a) if it might be worth you writing down a narrative of everything that happened from matching/placement to the child being removed from your care, as you say, against your wishes. It may very well be that as part of the grieving process, you become angry and wish to complain about how you - and the child - have been treated by the system. Or it may be that you decide you wish to move forward with adoption and be considered for matches with another child, in which case your narrative would be helpful in future discussions with matching social workers?
b) would you consider asking if you could write a 'farewell' letter to the child, expressing how much you had hoped to become their forever parent and your sorrow that they are now experiencing another loss, but that your greatest wish now is that they go on to live their best possible life? Such a letter would probably be kept on file till the age of 18, when many of our young people opt to access their earlier life records.
Sending you my very best wishes.