Our emotions come forth from the desires that we have and how well we meet them in reality. You have desires that were never fulfilled by your aunt and that made you feel disappointed, angry and bitter. The events of your past are now ancient history. You can't go back and change a single thing but you will continue to hold onto those debilitating and immobilizing emotions for as long as you hold onto those old desires.
You can do that through acceptance. Accept that you couldn't get what you wanted - never could and never will do. Release that desire (it should be fairly easy cos it's just plain and simple that you can't have that homeschooling desire ever fulfilled).
If you don't do this then you will forever carry out those ancient hurts. Life isn't fair and we don't always get what we want. As soon as you accept that and readjust your desires in accordance with what reality has dished up for you, the sooner you can get through this.
Focus on new desires, such as doing well at school entirely by your own means. Find better things to move onto and let go of those old desires.
Fundamental Insights Nick Pagan