Unfair

I agree with @boiboing, you need to get over it. Mothers do the best they can and I am sure she loves you. I was put in an orphanage and my divorced parents remarried and had second families while I was there. My two brothers and I got lost in the shuffle and were pretty much abandoned. Today, I have a good relationship with everyone. So what if I missed out on some of the love and other things. Life is so much more important that that. Be thankful you have a mom who loves you. Many children never know their parents or worse are abused by them. Count your blessings and go on with life.

I don't think you are being too sensitive. You clearly see the unfairness. I went through this growing up. But, it was after my Mom passed away that I understood why she favored my sibling. It wasn't that she didn't love me as much. It was about her own issues from the past.

I think you need to get over it and get on with your life. That kind of thing is fine when you're a kid but holding a grudge at your age is harming nobody but yourself.

Mothers do have some special love with a particular child but it is nothing to worry about. I am sure your mother loves you more than you think. No one loves us more than our mothers