That really is scary—when a relationship feels almost perfect, but in the long run, you realize you still might not be meant for each other. But disagreements and arguments are actually normal in a relationship. What you need to do is learn how to handle those situations properly.
Don’t let your anger control you too easily because when we’re angry, we often say hurtful things that we end up regretting later. Try to stay calm whenever the time comes that you and your partner are arguing, so you can think clearly and address the problem in a healthy way.
There’s a saying I once read: nothing can’t be solved through a good conversation.