hiya! well im going to try and give advice but remember its only an opinion although its quite a well founded one. I had a VERY similar situation with a girl I was engaged to, we split for different reasons but the same sort of feelings still remain
I still love her and given the chance to go back I would make sure that what happened never happened but hindsight is one of lifes ironies as you never have it when you need it
Anyway what I want to say is that if I was lucky enough to come back to this girl even as a friend I definitely would tell her that I still loved her. Finding a soulmate in life is SO rare and if your feelings are as strong as they sound then a friendship would be difficult anyway - so I would say go for it - take a chance but give yourself the very best chance by making sure you do it confidently and with the right reasoning behind you. I.e. not reasons like I'm lonely but things like I love you and in the time we've been apart I've realised what we had and why we should never have lost that.
I wish you the very very best of luck if you choose to make a go of things! And remember if its meant to be it will happen for you
I hope I've helped in some way!