"Really it’s about keeping to small, small groups of people. So if you have dinner with a friend, that makes sense as long as it’s just you and them." Okay ... that seems ... new https://www.vox.com/future-perfect/2020/4/2/21202903/coronavirus-covid-19-social-distancing-closed-circle-single-alone
Wait, there are some more details, in case anyone is taking this advice. You can have dinner with one person but the best idea would be to do it after 14 days of not doing ANYTHING including going to the grocery store.
Not at all an expert but I would add ... and probably don't check your mail, either? So you have to REALLY want to see this person.