Basically, you and your vibrator are well acquainted.
Either your partner doesn’t have a very sexual personality or lack of arousal could be deeper rooted in stress or even depression.
Consider if your sex life together was always this way, or have the two of you grown apart intimately?
It’s time to spend more time spicing things up together and bringing the fireworks back into the bedroom.
That, or moving on to someone who cares more about your pleasure...