Getting jealous easily usually means a threat detector is set very sensitive. The common reasons: fear that the person will leave, comparing yourself and coming up short, a past betrayal that taught you to watch for signs, a need to control what feels uncertain, or projecting your own impulses onto your partner. The feeling is real even when the threat is not.
Every outside person is a possible reason they will go. Jealousy is the alarm.
Where a chart tends to show it: Moon in Cancer, Venus in Cancer, Venus opposite Saturn
The question is not whether they will leave but whether someone else is better than you.
Where a chart tends to show it: Venus in Leo, Moon in Leo, Saturn in Leo
If trust was broken before, the mind keeps a lookout so it never happens unseen again.
Where a chart tends to show it: Saturn in Scorpio, Sun square Pluto, Moon in Scorpio
If you can know where they are and who they talk to, the uncertainty becomes bearable.
Where a chart tends to show it: Venus in Scorpio, Venus conjunct Pluto, Venus in Taurus
Sometimes the suspicion is a reflection of a temptation or doubt of your own.
Where a chart tends to show it: Mercury in Scorpio, Venus opposite Pluto, The 7th house
One person's jealousy is about the partner: will they leave? Another's is about the rival: are they better than me? Reassurance helps the first. It does nothing for the second, whose jealousy is really a verdict on their own worth.
Self Dictionary finds yours. It calculates your chart and numbers from your birth date, time, and place, weighs every signal together, and writes which of these reasons is actually yours, as plain behavior. It shows up in these areas:
See how this pattern shows up in youFor reflection, not diagnosis. The reasons above are common psychological patterns; the chart signals are where Self Dictionary looks for them. If a pattern here is causing you real distress, a therapist who works with attachment can help.