What is the point of jealousy?

I got jealous ONCE last year, I had to tell myself off it wasn’t me at all. Someone in my family sent me a link via text to me - the link was a link of their new big house worthy quarter of a million, at first I didn’t know what it wasn’t or how to open the link then after a few days it all fell into place and after thinking about the time it’s taken me to work for what I have under different more honest circumstances, blood sweat and tears on my own home I felt so jealous and the fact that they sent it to me on my birthday- bog Off I thought 💭 lol but I’ve visited them now and their house is just a house and to be honest it doesn’t look like it’s worth quarter of a million because it’s smaller than I exepected for that amount of money. And last I heard they are house poor. Silly soda lol