Being one-on-one with another person is so intimidating and intense, and usually I can only maintain it for so long before it feels like work. I like centring it around an activity, so if you don't have anything to say it's less awkward, but every once in a while the right person at the right time comes along and I feel comfortable enough in their presence that I actually crave unstructured one-on-one hangouts. Finding the right person is tough, but thankfully there's enough people in my life who I prefer spending time with as part of a larger group, and that's totally fine as long as they don't mind either :)