Well there's a few things to check out first..
See if there's a medical condition. It isn't clear if you're male or female. It doesn't matter if the situation is emotional or situational, but critical depending on the age and gender .
If it's not physical and you gave a partner. Then it's time to slow things down and explore each other. With all you have that still functioning. So fingers, hands, tongue, etc.
Pack a figurative lunch box for this. Have stuff to drink, handy snacks (For both energy and play).
Explore. Take your time and savor each other. Then if you still can't get anything out of each other pleasure wise, then either you won't and need someone that will. That or you need professional guidance.
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