Frustrated with family favorites
I generally have very poor self exteem and a lot of anxiety and depression all the time. That being said I am getting so frustrated and fed up with my husbands family
The first thing is that I am having restentment toward my sister-in-law and it really isn't her fault but I don't know how to stop feeling b*tchy to her. My in laws have from the beginning asked me to help them out with all kinds of things, I cook and help them move boxes/furniture, help them garden etc. Not things I enjoy doing but I don't mind helping out. It takes up a lot of my time though and it is hard to fit in to my already full schedule. A few years ago my brother-in-law met a girl (I was very excited for him and also to have a new famiy member) but she is nasty and insulting and my in-laws treat her like a princess. My mother in law is always telling me how smart she is and how lovely she is and they NEVER ask her to do anything to help out. In fact - I live in a different country and am helping to support the family during isolation while my bother and sister in law live a state away, she doesn't work and never help out (in fact I recently learned a lot of the things that I am sending my mother in law are going to them).
I work full time in a demanding job as a molecular biochemist and spend my free time volunteering for several organizations and helping the community, and I am working on my advanced degree. I am not trying to put myself on any sort of pedestal but I care a lot about other people and I think I am a decent person but I really feel like I am the pack mule of the family. Every time I talk to my mother in law the conversation is her shopping list that I buy for her and have delivered, then the hardships my sister in law has to go through and how tough her life is (again, not working + free schooling for her phD + free living arrangements and she doesn't do anything for anyone but herself, and calls everyone in the family nasty names and makes mean comments).
It all ends up with me resenting my mother in law and my sister in law. I get stressed out when I get a text message because it is always something added to my plate, or I end up feeling like a b*tch because I don't want to hear about my sister in law anymore. I really don't want to feel this way, and the feelings slowly built up over time to where they are now (I really didn't used to care) but I don't know how to stop feeling resentful