How long should the ‘talking stage’ last?

I’ve been talking to this guy for a month, we’ve only been on a couple of dates due to him living an hour from me and we both have busy schedules, but there’s a real spark between us. At the start he said to me that he wasn’t specifically looking for a relationship but wouldn’t be opposed to it if he found the right person, and he’s joked about introducing himself to my parents as my boyfriend, so I’m making the assumption that he can see the spark too... But how long should the talking stage last? I don’t want to rush it, specially with what he said when we first started talking, but I also don’t want to risk taking too long and letting it fizzle out...
How long should the ‘talking stage’ last?
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