In order for this cheat to work you have to find a person out of no where and talk to them(make sure you are in a good mood first. Talk, entertain, ect. The next day call them! Invite them over make dinner, lunch or breakfast for them. After this happens your friends level will be rising! Flirt, hug, and kiss (make sure they are in a good mood first). Then keep flirting, hugging, and kissing them your love will be flying high!

NOTE: May not work if your Sim or your want to be lover is in a bad mood!