No it’s not healthy for the children to be introduced to new people too soon. They make attachments and when the parent ends the relationship they children feel a loss.
Sounds like you bottled up a lot of those emotions for a long while and your recent camping trip and all the fond memories you had with her regarding camping triggered all those emotions.
We need to feel them, work through them and know it’s ok to feel all of them. That’s how we heal.
And it’s ok to talk to people about how you feel, its when that is all you talk about is her that it becomes an obsession. Big difference!!