I would willingly have lent you the money myself if only Id known you needed it

I would lend you the money willingly if I were convinced that you really required it.

As I realized just how neccessary the loan was to you, I naturally lent you what you needed.

Had I realized that you were in need of such a loan, I would gladly have lent it to you myself

I was under to obligation to offer you a loan, but nevertheless did so gladly