If you truly feel you are a nymphomaniac, you might want to go
for counselling.
Possible organisations you can seek counselling from besides
the FSC near your home.
Society of Planned Parenthood.
or in a serious case,
you might want to go to IMH for psychiatric counselling.
Sex is an enjoyable thing and everyone should enjoy it. But if it
becomes the sole pushing factor in your life and affect other
important relationships, then it can be very painful.
While counselling may or may not help, it may open up windows to
your own understand why sex is so important to you. With this
understanding, hopefully you can control your sex life, and not let
it control you.