Is his arrogance because you are too tolerant of him or because he has a bad temper? I think this may have something to do with your way of getting along. He is a person who is easy to lose his temper and impulsive, while you are relatively calm and not easy to lose your temper. Whenever he loses his temper, if you don't stop him, his temper will get longer and longer, and his attitude towards you will be bad.
Secondly, it may be caused by the mismatch of values between the two of you. For example, he is much stronger than you in financial ability, and you often need his financial support. At this time, he belongs to the "highest" attitude, which is what everyone says, "rich people drag."
Economic ability became the reason for his arrogance. Anyway, you can't live without him. He can lose his temper as much as he likes.
If you don't hate him, help him. He just hasn't grown up yet, but he feels inferior. Find his bright spot, praise him more, praise him in front of friends, and let him know his beautiful side.
There are too few people who naturally understand love, and most of the feelings are running-in. Break up when you meet something you don't like. The emotional foundation is too weak. Why do you want to make sure that this couple cares about you? I really don't understand why some people take "being together" as a very casual thing.
If you want to go on, give the other person more tolerance and guidance and let him feel your heart. Every young couple has to go through the process of maturity together. No matter who guided this process, the time when they can laugh together after many years is past.