Do You Have to Say Something to Your Friends?

I see how this disparity an income is affecting the friendships i have with these ladies. I honestly don't think it's even intentional, but they see me as a single woman making this money and automatically think that i just got it. There should be some sort of reciprocity. And i really don't think i should be takin advantage of them. What would you both do? How should i approach the situation? Thanks.