Listen Turtle, sit with this for a while, but you have been moving in this direction for a while. Unfortunately, you took the opportunity to have this conversation due to emotional response.
Lying is my deal breaker as well. I get the "I didn't want to hurt you", but they do not understand that lying is also control, that by lying, one takes away the ability to make decisions based on information given.
I also know that we should be making decisions based on us alone, but sometimes that is not feasible with an S who has been part of your life for so long and whom you still love. Sometimes the best we can do is recognize this and try to do what is best for us alone any how.