when he wakes up is he crying, or just awake and happy? If he's not crying, going to him may enforce the habit of waking up. If he is happy, or just fussing a bit, don't go to him. Give him a chance to settle back to sleep. If he is full-on crying, then yes, go to him. But he might just want to wake up for a little while and play and then go back to sleep.