I'm going to stop all kind of communications with my best friend (male) because he got engaged
Why are you going to cut off your best friend?
I'm in love with him and I just can't stand to see him and that bitch getting married
It is rude to ghost your best friend regardless of how upset you are. This wasn't an immediate change so you should talk to him first so he understands what you are doing.
Do you think he will break up and we can be friends again?
If you ghost him I doubt you will be friends again. I think you should talk to him and tell him how you feel about this, You need to confess your love before he gets married and get it off your chest. You might lose him anyways but if he feels for you you have a chance.