Eco, you have just been through major trauma, and have experienced many losses on many levels, and I think you need to spend time on rebuilding your new life. Rebuilding it solidly, not putting a patch on things by trying to plug the emptiness and loneliness you feel. These feelings are entirely normal, and it sure sounds like you realise that, from what you have said. Don't forget though, this too shall pass, these feelings will not remain forever. Be strong, be fair to yourself, be fair to your bird, face your problems head on, which I know you can do because you have already made it this far. When you have healed, you can re-examine wanting to get another bird, but for now I think the focus should be on you and your feathered friend.
(Excuse the psychobabble, 10 years as a mental health nurse lol).