how do you know if your boyfriend is dumping you

okay girls so my boyfriend and I have been through a bit lately and just the other day we were fine and then he cracked the shits at me and i don't know why. last night I was trying to talk to him and ask him is he's okay and asking if he was having second thoughts about me but he was so blunt towards me is it a sign bc I've been with him for about a year now and I don't want to go through the pain of a break up