Does it sound like my grandma doesn't like me?

Anonymous
Sorry if this has poor grammar since I am on my phone. I go out of my way for my grandma a lot unlike the other grandchildren in my family. I don't mind helping her when she needs it, but I feel like even though I do nice things for her she doesn't like me. I have a college degree and currently getting a masters. When I got accepted into the masters program she didn't even seem happy for me. All she cared about was if that meant I would be at the school when my cousin goes so I can "help" her. My cousin got accepted to the school I go to for her undergrad and my grandparents are obsessing about it and have been for months now. I have achieved success once and will again soon with my masters and I am being compared to an 18 year old highschool student from a mediocre high school. I don't really care if I get praise or whatever, it's mainly the fact that I am being constantly compared and my achievements are being totally ignored.

My cousin and her family are coming to dinner tonight and I am going to have to hear the constant comparing. I feel like my grandparents are making us compete for their affection and my cousin is fueling the fire with her constant bragging and putting me down. If I tell my grandparents my grades and she's there she comes back with "well I got an A in algebra" and they fawn all over her and ignore me. Highschool algebra isn't really comparable to a masters course. Anyways, I just got accepted for a job in the department and want to tell my family at dinner and don't know how to handle my cousin when she will try to make me feel like I'm stupid and put me down. Has anyone ever dealt with family members like this? I don't feel like it's normal to have to comepete for even a "congrats" from my grandma. PS. my mom and brother have noticed this and they are becoming angry.
Updates
+1 y
Thought I should add that my grandma spent a noticeably less amount on me on Christmas than all my other cousins. I don't care about gifts, but figured it might be helpful for anyone kind enough to give me their opinion.
Does it sound like my grandma doesn't like me?
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