Hi @Dog_lover and welcome!!
Oh gosh, that sounds awful. Jealousy is such a complex emotion, one that is often demonised but in reality, it's a normal reaction to the very real and very scary experience of not feeling our needs met. In this case it may be the need for connection, or for meaning and purpose... and so to see someone else embodying a life you feel you cannot access is a deeply painful experience.
Glad you found this space to connect and share what you're going through. If there's anything you think could be helpful at the moment, even if it's just a space to vent - the community is here for you 😊