Being single or being non-single aren’t absolutes. Let’s say you’re not single: how much contact do you have with that other person? Daily? Weekly? Something in between? Will that level of connection remain constant or change over time? Let’s say you’re single: does that mean you’re alone all the time? Can’t you even have a companion occasionally? What you might really need is a sex partner. Or, you might need a partner to improve your social status. If you’re a mediocre guy, there’s nothing like a vivacious girlfriend to make you more popular.