JEALOUS I see You and I Laugh at You.
A person may be jealous of another person’s success, social status, or accomplishments. They may also be jealous of their habits or lifestyle.
Jealous people are often non-confrontational. They may even pass off as super-friendly; they fight their fight against you underhandedly. They will downplay your achievements, spread malicious gossip about you, or just talk crap regarding you behind your back.
A competent and self-confident person is incapable of jealousy in anything. Jealousy is invariably a symptom of neurotic insecurity.”
Robert A. Heinlein
Jealousy is usually very easy to spot. You just notice the weird vibe someone is giving off and know when someone is jealous of you.
But sometimes, it can be a bit difficult to spot especially when someone is hiding their envy behind a friendly mask.
They might portray themselves as well-wishers but internally they feel more content to see you fall than to see you rise.