I don’t think there’s anything you can do about that other than know that the intensity of it will lessen with time. In my experience with many kinds of relationships, closure isn’t really a thing I’ve gotten from further contact. Still I always imagine one more conversation in which loose ends are tied and I’m left with acceptance.

What has been helpful to me has been learning to grieve. Identifying the feeling, allowing myself to feel it, distracting myself and then returning to it and finding a place to talk about it or write about in all it’s repetitive tediousness. The thing to bear in mind is that there’s nothing wrong with you for feeling this way.