Am I In The Wrong?

I have been raising a child for the last 9 years completely on my own. His father just one day walked out on us completely out of the blue. He paid $600 in child support per month for about 6 months and then suddenly it stopped. So for 9 years since the last payment I’ve supported him. I’ve busted my butt making sure he had everything he needed and then some. I often went without. I’d lie and say my stomach hurt at dinner time just so he could have seconds if he chose (if not, I’d eat what was left after he was tucked comfortable in his bed.) Fast forward 9 years and I was informed his father was coming into a large sum of money and one of his family members told me I should try and collect the many thousands of dollars in back support so I can give it to my son. Here is my dilemma, I will absolutely put money aside for my son but I don’t think he should get all of the money. I spent my money raising him, we are talking school supplies, clothes, field trips, a home, food, medical bills etc. you get the point. Now I’m being accused of being a jerk for not giving all the money to my son. I feel like I deserve some of the money as reimbursement for all I did. So AITA for keeping some of the money??