IMPULSIVE

n. impetuous, emotional, unpredictable, unpremeditated, unplanned, spur-of-the-moment, extemporaneous, unconsidered, offhand, instinctive, involuntary, spontaneous, quick, sudden, precipitate, immediate, snap, rash, headlong, rash, reckless, devil-may-care, foolhardy, madcap, wild You may say that it was impulsive of me to give her all that money, but I love her