This disease is a bit controversial in terms of it's importance. However, there is enough data I believe that it is potentially harmful. Dr HHH doesn't believe it is, but I have a good deal of evidence that disagrees. If I were your boyfriend I would definitely be tested.
By the way, regardless of the importance put on this disease, nobody believes you can catch it from the shower or a toilet seat. There is some evidence you can be born with it, which would be a non-sexual route for infection, but after that, if you got it, it was through unprotected sex.