Firstly, you need to give a friendly introduction, then ask if they are single (because they will not like you if you flirt with them if they already have a boy/girlfriend)
then keep being friendly and romantic but never do the same thing twice in a row (they don't like that) then when you are a friend then it might be time to kiss. then if you want it further then call them each day at an appropriate time and invite them over and relax... :D
Chat with our AI personalities
yes you can
Not that i know of but you can be as soon as they are teens you can
Boyfriend.....you can't create a boyfriend. These are the 3 things you can do to create your own sims: 1) You can create a sim along with your girl sim and call them "Housemates". Then, along the game, get them to date using romantic interactions. OR 2) Create the sims in create a sim and call them "Spouses", that, though, will make them married. OR 3) Find a cheat online....
no
Lots are out. The sims 3 university, sims 3 nightlife, sims 3 adventures, sims 3 generations... you name it!