True confession: I’m impotent, how do I tell her?

My name is Raymond; I am from South South, Bayelsa State to be precise.

I was going through the Internet when I stumbled on one of the articles published on this website entitled:  True confession: How do I tell her I have a child for another man?
I was really impressed by the comments I read from readers and I think I would use this medium to share my problem as well. I am in my mid 30s, working with one of the branches of United Bank for Africa (UBA) in Aba, Abia State.

I was involved in a ghastly auto crash a few years back on my way home from the east for Xmas celebration. We were between life and death before God eventually sent a duex mechina to our rescue.

The incident damaged my reproductive system. The doctor declared me impotent ever since then. I met a girl in 2008 who came from one of the private institutions in southeast for her 6 months internship. One thing led to another, we both fell in love with each other and that was how the journey started.

During our first date, she told me she was a virgin and I promised her ‘no pre-marital sex.’

Four years down the line, we are still on. The parents are aware of our relationship. In fact, I just declared my intention of walking her down the aisle in December, but the question is that how would she feel when she discovers that I’m IMPOTENT?
Dear readers, please advice me, I cant afford to lose her.