Miscarried

I don't know how to deal with this. Im 21 and i had been wanting a baby for a long time. I miscarried 3-4 weeks ago just a day before turning 12 weeks. The worst part is i found out i was pregnant cause i was having the miscarriage. The only person i can talk to is my bf and idk how to talk to him about it. I know he understands it to a point but its a topic he doesn't like talking about as he wasn't and isn't ready for kids. We actually fought the first two weeks straight cause of it. Idk if it was his way to cope with it. I really needed him and i feel like he wasn't there for me.