Your husband is telling you both in actions and in words that he’s not ready to be a full adult and husband. He is hanging around with single guys who are younger and who are not married. He’s made it clear that his first loyalty is to the group, not to you. The friends haven’t come between your marriage. He has put them there.
You end your letter by adding that he is threatening you. That should send up some red flags as well.
None of this looks promising for making the marriage work. No matter how much you want to make a life and a future with him, you can’t do it alone. One person can’t make a marriage any more than one hand can clap. Some of what you are experiencing may be a cross-cultural clash but I don’t think that explains everything. He’s acting like a man who wants to be 22 and single, not married with responsibilities to someone else.
Before you give up, I hope you will try to have a serious talk with him. Take the time to be clear in your own mind about what you will and won’t accept for married life. Then pick a time to talk to him when he isn’t pulled to be with his friends. Don’t answer his threat with anger or with threats of your own. Keep your anger under control so he doesn’t get defensive. Ask him if he has been trying to tell you that getting married was a mistake. If so, what does he want to do about it? If not, what is he willing to do to become a true married partner and what compromises does he want from you? His answers will give you the information you need to make a decision.
It’s terribly sad to end a marriage, especially so soon. You married with love and hope in your heart. He apparently didn’t fully understand what it all meant. With a little more information, you can decide whether he will join in making a partnership with you or if you need to cut your losses, mourn the relationship and move on.
I wish you well.