I realize people are always going to disappoint you , it might be at office , family , relationship and others and people find it hard to move on , the worst thing that can happen to any human is to be depress about what is already in the past.
Why don't you move on and focus on the future , bigger things ahead of you.
1Write down a short realistic goals
2 Action : Keep to the goals
3 Be discipline
4 Be Consistent
5 Be humble
6 Be ready to learn from others.
7 Be happy no matter how bad the day can be.
8 Be thankful
9 Be grateful
10 Never give up
I hope it will guide you to believe in your dreams and never compare yourself with anyone , wish you all a great FRIDAY.