He thinks he has good friends. You have to admit, though, it is a little disconcerting to have none of them there for your rescue. That's why Han is so perplexed by the situation. Besides Sara being involved in the operation at all ...

"I can't let you just leave."

He probably couldn't stop her, honestly. Not before being frozen and not right now, while he's still trying to kick the effects of hibernation sickness. Yet, there's something about the tone of the words that suggests that he thinks he could make difficult.

"Not without knowing why you risked you neck for me. Why you came after me on your own ..."