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Hello and thank you for your question.
If you have been living together since June 2013 then it appears you have been living together for 2+ years so you will qualify as a de facto spouse. That should give your reasonable standing both to claim a share of his estate, should he die, and to apply to be appointed control of his financial affairs and/or as guardian to make medical or care decisions for him if he is unable (including decisions to donate organs or turn of life support). Such will require an application to the relevant state court or tribunal (This differs from state to state, but if it is Victoria as I'm inferring from your question, you would need to make an application to VCAT and can read about this here: http://www.vcat.vic.gov.au/adv/disputes/guardians-administrators).
If your partner has assets, because it appears you do qualify as a de facto, you likely have a strong claim on your de facto spouse's assets, which means that you can likely find a lawyer willing to assist you even if you cannot pay up front, but to protect your rights in a case like this you will need legal assistance and I would therefore strongly recommend you seek out a lawyer ASAP to assist you. If you need help finding a suitable lawyer contact the Law Society in your state (the Law Institute in Victoria) as they can refer you to suitable lawyers in your area.
I trust the above assists and wish you luck in this difficult situation.
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