Being ticklish is not your problem. You still are.
The issue is that you, as you said were molested. Which comes with a nice big pile of baggage as you deal with it. Trust issues are going to be there for you. And tickling can be influanced by mental state very strongly. If you are uncomfortable you will shut yourself down. It's self defense. Very natural given what has happened.
As you spend time with a partner, get to know them, get comfortable with them, you should start to see your ticklishness return when you are with that person.
Talking with a pro might be a useful thing that will help also. The problems that you are feeling might go beyond just tickling.
I hope that you find some peace, and start to be able to enjoy things.
Myriads