Is it normal to not want my best friend and best cousin to be happy?

Jealousy is normal. But NOBODY'S LIFE IS PERFECT. On the surface it might appear that way and that's why we feel jealous, but EVERYBODY has a hangup/problem/issue/abnormality. You just don't walk in their shoes or are around them 24/7 to see this for yourself. It's called Yin-Yang theory...rarely is anybody's life in perfect balance...And if you could switch lives with someone else who you wish you could be, you'd eventually regret it. Own your own life, your own walk, own and be proud of what you have been given, make something of your gifts, talents...we all have something we are good at/makes us happy....you are wasting precious time and energy being jealous, and you need to take back this jealous energy/time, transform this negative energy into energy to spend on loving yourself, focusing on your own life and living the best life you can, and feeling good about yourself....