Am I being silly?

My ex husband just lost his oldest son to suicide. He was 20. They had the funeral Sunday and I bought my kids new clothes so they could go to their brother's funeral. He was a single dad when we met because mom left so it was always him and my ex step son. I sent flowers and also went out of my way to find pictures of them that i had and decorated the flowers with them. I didn't get a thank you.... Then he mentally couldn't care for the kids for his custody day because his dad to switch was the day of the funeral so I kept them an extra day. Still no thank you. I just feel some type of way because I'm his ex wife. I didn't have to do any of those things for him and not even a thank you