Allah gives to whom He wills, He does not take from you to give to others.
We often question, upon seeing the happiness of others: "Why not me?" But the Lord who is for all, does not deprive you by giving to someone else. What is meant for you will surely reach you and cannot be in someone else's hands.
In Allah's distribution, there is wisdom, and in time, there is mercy. Just wait for your share with gratitude and patience… it will come to you at the best time.