I'm not sure if I was molested
Why are you even questioning this?
It causes a lot of problems in my relationships with people
I am sorry to hear that.  It is a good idea to look into something deeper such as being a victim of molestation.
That is what my co-worker said but I am unwilling to even go there.
Hiding out from your own experiences because they are hard to handle is going to come back on you when you least expect it. Get some professional help and you can get through this.