I'm thinking of hiding both a pregnancy and miscarriage from my boyfriend
How will your boyfriend react if you hide things from him?
I don't care about my boyfriend anymore, I hate him always boasting about his achievements
Your boyfriend has a right to know about a pregnancy and miscarriage as he is involved directly. Hiding these things from him is a bad idea. You will lose him if you hide the truth.
It's my body and my life, I don't want him to be a part of it anymore.
Well, if since he is the father he deserves to know about it. You should not be secretive about such important things to your life partner.