Is there perhaps a word or phrase that describes negative selfless behavior?
Generic Behavior:
If a person looks after the needs of others to such an extent that their own needs are not met then not only will their own well-being suffer but over time this person will also fail to take care of the needs of others (due to the lack of energy/motivation).
Simple Example:
Samuel enjoys going to concerts once a month. Susan likes Samuel and wishes to please him but she does not like music at all, especially not concerts. But she goes and pretends to enjoy the experience when in reality she only enjoys pleasing Samuel. Over time Susan begins to associate her negative feelings of music with Samuel. So Susan's selfless act was initially performed to please Samuel but over time this has eroded her desire to please him.
It could then be argued that this type of selfless act should be avoided. Each person should behave selfishly and express their own desires. Altruistic acts lead to an erosion of desire/motivation/and positive feelings for the recipient.
Any counter examples where altruism leads to increased well-being of both parties? Perhaps the altruistic behavior in this example is only penalized due to self deception. He is unable to respond appropriately due to misinformation. So, altruism is not the culprit, self deception is. Thoughts?
Update: It appears so far the best word given so far is by stoicfury
Sacrifice
This word does fit what I outlined in Generic Behavior. But unfortunately I believe I've left out a bit of information. Sacrifice is often viewed in a positive light. Suffering for the greater good. I'm wondering if there's a word that is kind of like an analog of sacrifice. Sacrificing for someone else and then feeling bitter about it.
So, to rephrase: Is there a word/"effect" that describes someone sacrificing for someone else and then feeling bitter about it? I'm wondering if there's any studies which have described the phenomenon. An example of a phrase that describes a complex social observation: Dunning-Kruger effect
And the reason I'm looking for this word is so I can do more research into this behavior.