Choosing Happiness

I have been struggling with something for as long as I can remember. I have a really hard time being happy for people. Even people I want to be happy for, I have a super difficult time getting there. I know this stems from jealousy and jealousy stems from my own insecurities. I definitely am aware of my insecurities, and I think that knowing that they're there makes this a little bit easier to deal with. I want to be able to celebrate other peoples success without feeling like I'm a complete failure. I want to be happy for my friends who have things that I don't have without feeling like I need to have it first. I want to be happy for my sister who excels at most things she does. I have such a hard time with this! Why can't I just be happy for people that I genuinely love and care for? I need God to work on this in me. I want Him to bring to light my insecurities so I can face them and not feel jealous toward these people. I am praying for Him to show me how to be happy for others. I want Him to help me have better self confidence, so I don't constantly feel the need to compare myself to others. I love this quote:

I could not agree more. I need to stop feeling like I need to have what others have. I am so blessed and don't need to compare myself to others in order to know that. How often when I'm teaching/tutoring/subbing do I tell students, "you worry about you." Why can I not follow my own advice? This doesn't mean that I'm not going to care about other people, but I need to remember that my success isn't defined by what is going on in someone else's life.
 Lord, I'm asking you to please help me to only be concerned with me. Help me not to compare myself to others. Help me to be happy for other people in my life. I know that with Your help, I can do this.
If you think about me, please pray for me that I will be strong in my effort to be happy for others. I like to think that I am a happy person, but if I cannot be happy for others, then am I really happy? I want to be REALLY happy. I want REAL joy.