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Something that has been on my mind.  All these are from Merriam Webster

Resentment:

A feeling of indignant displeasure or persistent ill will at something regarded as a wrong, insult, or injury

A feeling of anger or displeasure about someone or something unfair

A feeling of angry displeasure at a real or imagined wrong, insult, or injury

Envy

A painful or resentful awareness of an advantage enjoyed by another joined with a desire to possess the same advantage

Jealousy

A jealous disposition, attitude, or feeling

An unhappy or angry feeling of wanting to have what someone else has

A feeling of unhappiness caused by wanting what someone else has

An unhappy or angry feeling caused by the belief that someone you love (such as your husband or wife) likes or is liked by someone else

A feeling of unhappiness and anger caused by a belief that a loved one might be unfaithful

Depending on who you ask, jealousy and envy are either exact synonyms, totally different words, or near-synonyms with some degree of semantic overlap and some differences. It is difficult to make the case, based on the evidence of usage that we have, for either of the first two possibilities. Both jealousy and envy are often used to indicate that a person is covetous of something that someone else has, but jealousy carries the particular sense of “zealous vigilance” and tends to be applied more exclusively to feelings of protectiveness regarding one’s own advantages or attachments. In the domain of romance, it is more commonly found than envy. If you were to say “your salt-shaker collection fills me with jealousy,” most people would take it to mean much the same thing as “your salt-shaker collection fills me with envy.” But if someone made a flirtatious comment to your partner, you would likely say that it caused you jealousy, not envy.