Jealousy is when you count someone else’s blessings instead of your own.
These things tend to happen when your not happy in your own life so you pick someone happy ( usually an ex) to focus on. If it’s your ex it’s because your relationship didn’t work out and I know it’s hard seeing them happy but there’s a reason why it’s not you and it’s someone else.
I can’t see myself being jealous over my past or friends because I’m truly blessed and even on my bad days I have such a good life. I have been in bad relationships, I’ve been in the dark places where you think light is never going to come, all of those things have build me to have what I have now. True happiness. So your your wanting someone else’s life try fixing the one you have.
Jealousy is ugly and you were not made ugly.