I pretend to like my friends but deep down I am very jealous of how successful they are. I am sick of being called their sidekick
Don't you think being jealous of them is petty?
I think I have talent to become as successful as they are and I'm not utilizing it.
You shouldn't compare your successes with your friends. It's not ok to be jealous of your friends.
Hey, we're happy if you are happy, you can achieve what you want.
If you feel like you can be as good as them then start working hard for it. It's better than just being jealous and envious of them. Use those feelings as motivation instead!