My 7 year old son has trouble sleeping. He was always a bad sleeper but lately it has gone worse. He needs us to stay with him until he falls asleep and he wakes up 4 to 5 times during the night crying he wants someone with him. He tries to come to our bed but then his younger sister wants to come over too and we end up not sleeping at all. Any advice? Nothing changed in his routine. He just says he is afraid of the dark (he sleeps with a night light on in his bedroom, another one in the hallway and one in the bathroom next to his bedroom). We don't know what else to do, he is so tired in the morning..