You were tempted and you submitted to it. That's how anyone gets into any sin.
If you had a cancer for 27 years you wouldn't get all serious about it? You wouldn't want it out of your life? Hang onto it as a memento of the past? You either want to get rid of it or you don't. If you do then follow what the Bible tells you to do. If you don't, then (and forgive me if this sounds insensitive) stop wasting our time.
Revelation 3:
15I know your deeds, that you are neither cold nor hot. I wish you were either one or the other! 16So, because you are lukewarm—neither hot nor cold—I am about to spit you out of my mouth.
I think that's where you are at right now. That's why the Holy Spirit has wooed the human in you to come here. But you woo the demon who makes you unresponsive. Christ wants to know, are you in it with Him or does He get rid of you like old tobacco?
I understand about prejudices and not wanting to rock the boat with those you are familiar with. But what's more important, keeping others happy or ridding yourself of a long-term cancer?
I love you sister, but I'm not about to play warm and fuzzy with your demons. They have to go, or you will go with them. And that's seriously serious to me.