Am i just being spoiled?

My mother and I have never had the greatest relationship, its almost as if my mother has had some sort of resentment towards me. She is very close to my brothers but not me. She gives my twin brother and younger brother everything but I feel like she beats around the bush if I ask her for anything and she never follows through. I'm partly okay with it bc I am graduating college soon and hopefully working for the tennessee bureau of investigation so I am doing fine without her but I am hurt bc I don't understand why she has always treated me this way and made me always feel isolated.