He broke up with me... Is it for real?

So my boyfriend and I got in a fight… It’s not like this was our first fight, we’ve been together for 4 and a half months… We’ve had fights… But this was big… I mean we’ve fought over bigger things and it’s gone really far, we’ve broken up several times but we usually work it out and get back together… This morning he flipped out on me for something small and I got defensive, said some things I probably shouldn’t have, and he broke up with me… It was totally unexpected because like I said, it was something small… He’s broken up with me over big things before and we talked and we fixed it… But he hasn’t talked to me all day and I’m really afraid that this is for real… He has told me that if we ever broke up that he would never date again… I highly doubt that’s true, but I know it is for me… If this is the end for us then I think I’m done… I could never love someone else, I’ll never stop loving him… I’m just really having a hard time believing that it’s over, it doesn’t feel right… I feel like if I could just say the right thing or do the right thing then I could fix it… But I don’t know what to say or do… I am completely at a loss… I’d do anything to have him back. He saved my life and I can’t live without him… I guess I mostly just needed to rant about this, but any input would be appreciated…