Will sims find their own romance?

I find it hit or miss honestly. I've had sims that never seem to flirt with anyone to ones that latch on to a specific sim almost immediately, though that is pretty rare. My latest sim met Caleb Vatore shortly after moving in since he was the welcome wagon and I had her flirt with him once. Well, he asked her out all the time and she was always rolling up wants with him. I was surprised, since it is normal for me to have to choose someone and just go from there.

I really miss having an attraction system in this game. Half the time I match sims together only for one of them to decide that they like someone else...usually someone who is already married.