If your boyfriend is Mormon how can you convert and become Mormon?

Talk to your boyfriend. Or go to the church and talk to the missionaries. You can go to Mormon.org and get more info. However joining because of your boyfriend should not be your reason. Check it out and then decide.

yeah, the best way to do that is to talk to the missionaries. and i totally agree, you need to know for sure, for yourself that the church is true.

Read

Another thing to do is to read the Book of Mormon, which Mormons believe is another book, in addition to the Bible, that tells about Christ coming to Earth. It is pretty central to the belief system, and an important thing to do if you are serious about joining.

I agree, read the book first, and talk to as many people as you can (on both sides). MAKE SURE YOU KNOW WHAT YOUR GETTING YOURSELF IN TO! Conversion is a very big move that will be very difficult to back out of or renounce later in life. If you are not prepared to spend the majority of your life serving the church, following the teachings of church leaders or tithing at least 10% of your income, converting to Mormonism may be the wrong move.