jada....I think that only time will answer your question (with regard for you)......
Some can get to "friendship".....but, I think that the romantic aspects of the relationship has to die a natural death....this usually happens as the person moves on in their life......
If...if....after life moves on and the romantic attraction stuff has gone back to the soil......AND there is any respect and basic human caring left.....(sometimes there is and often there isn't).......there may be some basis for friendship---or, at least, some kind of civil acquaintanceship.......
That is good...especially if there are children from the relationship.....
dandylion