How to Say "to obsess" in Spanish
The Spanish word for “to obsess” is “obsesionar” — B2 level.

Examples
Ese problema me obsesiona y no puedo dormir.
That problem obsesses me and I can't sleep.
La idea de fracasar lo obsesiona desde hace meses.
The idea of failing has haunted him for months.
No dejes que el pasado te obsesione tanto.
Don't let the past preoccupy you so much.
Using it like 'Gustar'
In this active form, the thing doing the obsessing is the subject. 'La música me obsesiona' means 'Music obsesses me'.
When thoughts haunt you
If you want to say something 'is on your mind constantly,' use this verb to show it's taking over your headspace.
Wrong Preposition
Mistake: “Me obsesiono el trabajo.”
Correction: Me obsesiona el trabajo (if the work is doing it to you) or 'Me obsesiono CON el trabajo' (if you are the one doing it).
Related Translations
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