How can I tell my best friend ? Please help !!😣

Hanna
Soooo my best friend doesn't know that I have a boyfriend and that we have been dating for over a year. When me and my boyfriend started dating I told her everything and I expected her to be happy for me but she kind of disapproved...so after that I didn't tell her anything about him anymore ..now the relationship is serious and we are planning to get married 💐💍💒💑.. how can I tell her ?!?!?! Please help 😣