How do I stop being so nice?

I've been trying my best to be a good person because I like being wanted, but lately I feel like it's being less of a good person and sort of morphed into an inability to handle doing something remotely bad. I apologize over the smallest asking of favors and i have a breakdown if people think about buying something for me. The worst part is that when I vent to friends it makes me feel worse for doing "something bad" to them.

Does anyone know how to fix this issue? I think it's negatively impacting my life...