I freak out when we argue

So I have been with my boyfriend for 3 and a half years and when we argue it could be like a small argument where we won’t talk all day but I’ll just freak out so much to the point where I’m crying all day, I think it’s the end of us (I know for a fact he wouldn’t let me go that easily) so why isit when we argue I’m an absolute wreck?

It makes me weak in arguments and I really need to learn how to be strong and just accept arguments are gonna happen and it isn’t the end of the world.

Any advice? X