Active listening is more than summarising and paraphrasing (and of course those things have to be natural too), but it's about the ways that you show that you are listening when someone is talking (e.g. saying 'yeah', 'ok', 'oh' etc. and non-verbals, like nodding, smiling etc.). It also includes asking questions to clarify/verify information and to extend the narrative in some way. I think asking questions is particularly important in dating!