Yes, I understand this completely. You both shared a very intense lifetime together at some point in a past life. I would suggest a past life reading if either of you can afford one!
updated by @bill-walker: 12/23/17 02:37:11AM
Remember also that you and he, especially if you have shared other lives together, are not the same spirits/individuals now that you were back then, or whenever. You may be hearing a previous incarnation of his soul which may be a bit foreign to you at present, but who knows for sure!