Obsession is the worst addiction

There are a lot of things people obsess over. People,games, different situations

And because of their obsession,they might change themselves in various different ways to meet the standards of that obsession

It can also lead to other obsessions too

Example: "I need to lose weight for that person to love me" (they're obsessed with that person) then they start becoming obsessed with food and working out and overexercising

Some people even unalive themselves if they don't get validation from their obsession

(This might be badly written but I hope you understand what I mean)