How do you get rid of envy forever? If i can’t it will kill me.

Lucifer, one of god’s blessed angels betrayed him because he wanted his power. my situation is similar. this one girl i like i know ill never get but i still go for her. i don’t even give myself a chance for anyone else because i know i don’t deserve her or anyone else for that matter. that sentence didn’t make sense. anyways, i was just curious to see how many people have a big problem with envy. oh and if anyone has any good ways to commit suicide please tell thank you!