Boyfriend is narrow-minded, a little proud and gloomy. What should I do with him?

It can be seen from the materials you provided that you are a girl and young; It's just pre-puberty, and I didn't enter the de facto marriage. Age and private life are personal privacy and cannot be asked. But I can talk about my opinion for your reference:

First of all, people belong to primate vertebrates in biology. I wonder if you have been to the safari park. Have you ever heard of the idiom "two tigers are not allowed in one mountain"? As a man, "possessiveness" is a feature of male sexual psychology and a manifestation of human animality. What you said is not uncommon in the real world. I estimate that at least 60% of men are possessive, but in different degrees. And the resulting "love killing" and "suicide" can be heard occasionally. Your boyfriend's performance is just a situation that you feel serious in the contact circle. As time goes on, he may change.

If you think he has no serious defects in other aspects, I suggest you continue to associate with him, but you should clearly express your feelings to him. You can't tolerate each other possessing themselves like "goods"! Because now, after all, is not our childhood, or even the former feudal society. At present, an open society needs equality and respect from both sides.

If you find that the other person has moral qualities or personality defects that you can't tolerate, you can take this opportunity to break up. "There are plenty of fish in the sea" and you don't have to hang yourself from a tree.