Eminem is not currently married
just be honest with her. tell her why you wanted to wait a little bit.
Back in 2006, P!nk married motorcross racer Carey Hart. She proposed to him when he was racing one day, with a sign that said "Will you marry me"? and the back said "I'm serious"! They started...
No she is not
If you are happy with that person and he /she lives up to your expectation you will know however you wont know until it is all over,