Being left out -> negative feelings.
Why feel positive about it? Because it may be, that you’re being left out because you’re better than the others. ;)
Allah’s Apostle distributed (Zakat) amongst (a group of) people while I was sitting there but Allah’s Apostle left a man whom I thought the best of the lot. I asked, “O Allah’s Apostle! Why have you left that person? By Allah I regard him as a faithful believer.” The Prophet commented: “Or merely a Muslim.” I remained quiet for a while, but could not help repeating my question because of what I knew about him. And then asked Allah’s Apostle, “Why have you left so and so? By Allah! He is a faithful believer.” The Prophet again said, “Or merely a Muslim.” And I could not help repeating my question because of what I knew about him. Then the Prophet said, “O Sa’d! I give to a person while another is dearer to me, for fear that he might be thrown on his face in the Fire by Allah.”
So, Prophet (SAW) gives to those who have weak Imaan and leaves out the person who’s stronger. He did it as a strategy. But we have an awesome lesson to learn from it. And that is:
If you’re being left out of a certain thing on purpose, it might be for your own good. It might be because you’re better than that. You’re stronger. You’ll survive what the others won’t.
Don’t let negative feelings accumulate your heart. You deserve much better! =)