Thank you for your replies. It really does help to hear your encouraging words. As you all probably know, this position can be pretty lonely. I have not told anyone at church about my past with this person and have not talked about her at all to anyone. My intent is to not fuel the fire.
I would love to go to a different church but this is the first church I have found in about 14 years where I am growing spiritually. I also prayed several times about leaving the but believe this is where God wants me to be. I have strong days and weak days. As long as I keep my boundaries clear and protect them and focus on my spiritual path, I do believe as you said that this will pass.
Thank you again for your kind words. They are welcomed and appreciated.