So "everything you had" depended on him? Did you not have anything that you got for yourself?

So he broke his promise "to take care of [you.]" If your plan in life was to have someone else "take care" of you, then that was not a good plan. And it was not necessary. You can take care of you. You might need some assistance. We all need some help from others. And others need help from you and from me.

If you can't think of how to help yourself, then go help someone else. The world is full of "need." You have power. Use it. Help someone. Help a dog. Go feed some birds. Use your power to change something somewhere. You have power.

You made a plan. It failed. So make another plan. If it fails, make plan #3. If you get tired, take a rest. Then make plan #4. That's what people do to get what they want. That's the whole secret of life.