About three days after your tama becomes an adult, the matchmaker will come along (she's a tama character) and give you a chance to breed you tama with one of her singletons. That way, if you don't have friends with tamagotchis, your tama won't die old and alone. ^_^ Just relax, it will happen all by itself. All you gotta do is sit back and wait. When it happens you will know.
The matchmaker is a granny who comes when your adult tama is 7-10 (uless ur arwen099 LOL) It looks through a book then asks you Love? Yes or No. And shows you a pic of someone. If you say no. Youll never know when she may come back