She's always been a good sleeper, happy to read in bed for a while before going to sleep. About two months ago this all changed, she started getting really anxious about bedtime, didn't want to be alone etc. She sleeps really well if next to someone but hates the idea of being asleep alone.
Nothing has happened to make her feel like this, no bad experiences etc. She is having slight issues at school with friends and stuff which we are working on and it's probably this that's keeping her awake at night, but we don't know how best to deal with it. I don't want to start sitting with her until she falls asleep as she will start relying on it and then we can never stop that. DH thinks I'm being mean and we should just do it. We have tried going in at regular intervals to reassure her we are still here, she's not alone etc, it seemed to be working for a while but over Christmas she seems to have gone backwards again, she's now crying three hours before bedtime saying she's already stressed at the idea of falling asleep.
Any ideas of what to do here?