When the Sims have a good relationship, propose to the other Sim to move in. Don't have an account? This will bring them even closer to each other. A date will appear soon. To get people to come over and try out for your Sim, you could try ordering pizza, and after the pizza is delivered you could make your Sim talk to the pizza delivering Sim, as they interact just as a normal Sim does. Forgot your username or password?
They could be causing the problem.
I rarely have to direct them to do stuff, they just play all they want, then take time to meet their hygiene, food and energy needs autonomously. Show less If you have forgotten your password, click hereor if you have forgotten your username, click here instead. Are you sure they're all patched? Make the other Sim feel special. If my female Sim wants a redhaired guy with a beard, then I make one just for her.