It was my libido that would have wrecked my marriage if I had not done something about it. My wife's libido wasn't that great, even at the best of times. After a bout with cancer, losing a breast, uterus and all hormones, it went negative, while mine was still in the 18-year-old range.
Obviously she understood the problem as well as I did, but still she was very much against my castration. Had it not been for the pains I started to get, I don't think she would have agreed.
River, if it looks as if you and your ex can get together, GO FOR IT!!! I never thought I would say this, but a good relationship as "best friends" or soul mates or whatever you want to call it beats the hell out of a hot sexual relationship any day of the week!