Is this crazy.......or not?

I am a 56 year old man who is falling in love with a 44 year old woman in South America. Now for the details. I am twice divorced and she has never been married. I live in a rural area that can have very cold winters, she lives in a city with a constantly mild climate. I am quite large at 6'3", she is 4'11" and petite. Where I live being able to drive is almost a necessity, she has never driven a vehicle in her life. We have been chatting for over 5 years now, there was a break after the first 15 months when my "head" started telling me that there were just to many differences between us for a relationship to ever be able to work. I dated another woman for a while during that time but always in the back of my mind was the lady from South America. Several months ago I had reason to email her but I sent the email without any expectations of us starting back up where we had left off before. However after we traded a couple of emails she said she would like to start chatting again and I was elated over her saying that as I was not really expecting a second chance with her. But now here we are, chatting nearly every evening with webcams (no, nothing naughty) and voice chatting and my heart is telling me that this is the woman I have been waiting all of my life for.....but there are still the little voices that say there are simply to many differences between us for her to ever be happy here. I messed up once before when I listened to my head and I really want to follow my heart this time. Is this crazy? Am I crazy? I could use some well thought out opinions on this. Thank you to all who tackle it.