Am I a train wreck waiting to happen?

It all started September of 1987...The girl of my dreams appears our freshman year of high school...I fell madly in love with her then...I never told her I liked her, was only a friend...A friend who was always there for her in her time of need when others treated her badly or abused her...After highschool I joined the military and did many tours for Desert Storm...I came home on leave and she came to see me...She asked me before she left that night to kiss her...I couldnt do it, she was dating someone for all of 3 days...I left and lost contact with her...Fast forward to last summer...I am on facebook and a friend request from her appears...HOLY shiit...Every emotion, every feeling came flooding back to me, only this time it was so much more...Except two bad things...She still had no idea how I felt about her, even after 23 years...We got to talking and she expressed how unhappy she was in her marriage, he is abusive mentally and ually...I was happily married...I did the right thing and tried to help her fix her marriage, as I have always done in the past I just wanted her happy...8 months go by and we still talk atleast once a week...Then one fateful day this February my wife has an affair...Says it all...We are divorced now...Just prior to my wifes affair my dream girl tells me she wants out of her marriage...So I tell her if she wants out she needs to do it the right way and see a counselor and what not...Here is where I feel like a P.O.S....I break down and tell her how I felt about her after my divorce...Now we are so unbelievably in the wrong that I am surely going to hell because we have been seeing each other for 3 almost 4 months...Not that it matters but we have not had , just everything else but we are still cheating none the less...Through all this I have wondered if she is just using me to feel better until one day she shows up with every present, every letter I had given or written her from high school...She tells me that she looked me up for a reason and that it was because she had always loved me but never said so either because I was happily married...Now, she is trying to get out of her marriage but he is beating her down mentally so much she feels like she wont exist without him even though every time we are together it is like we were never apart only this time with romance involved...So in your opinions are we headed for disaster or could this be true love?