What should I do? I can't stand my boyfriend?
Why can't you stand your boyfriend?
He always yells at me, I want to forget him
If your boyfriend doesn't respect you, you should leave him. Staying together can be harmful for you and be unhealthy for your emotional health.
That's not the point. He can be like that sometimes and I'm okay with it so I'm not leaving him.
It seems that you are confused about what you really want to do and that is understandable. However, if you feel your boyfriend is hurting or mistreating you, you should end the relationship.