What do you do with friends that do this to you?

Do you have friends that are financially well off and let you know it? They send you pics of the $3,000 house they rented on the beach, when they know you are single, and are on a limited income. They tell you how great their lives are when they know yours isn't going very well. And more pics on your text of them on their boat, etc.
I just don't have anything to say back to them. I really am wondering if they just need someone like myself to show off to? I don't want to be friends with them anymore because all they do is brag to me about their lives.
How would you handle this situation? I had two friends that did that to me, and I dropped one of them after a 50 year friendship. The other one just sent me pics of her and her mother looking happy, and wearing matching shirts. She knows my mother passed away. Why do they do this to me? It really hurts my feelings.
What do you do with friends that do this to you?
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