I'm Unable to Climax Without a Vibrator

Hi Dr. Betty,
Oh, where to begin. At 27 years old, I have sort of given up on myself. I have been sexually active for about a decade and have been in loving relationships with different partners. I consider myself quite a sexual person, comfortable with my sexuality, etc. But I am unable to climax without a vibrator (both on my own and with a partner). I originally learned to orgasm at a young age using a make-shift vibrator. Now, when I try to touch myself without a vibrator I either a) find it too intense (directly on the clitoris) or quite dull (around the clitoris).