Name and explain two factors contributing to a detrimental relationship

Disagreeing on large events (such as a girlfriend or boyfriend) this is because if you disagree on a large event to the other person they will most of the time try to defend the event which could cause them to become aggressive. Being able to mentally cope with the other person even I have times with friends when I get annoyed with them so I know that you need to be able to cope with them if they do start to annoy you at times if you can't this can cause you to get stressed then also become aggressive towards the friend as you would see them as the cause of the stress.