I appreciate your detailed letter. Since you did not ask a specific question, I can offer only general advice. I have a few concerns about the relationship that are detailed below.
To begin, the intensity and quickness of the relationship is concerning. You mentioned that you had already said “I love you” to one another after two weeks. This is very quick; maybe too quick, especially after he just ended a two year relationship with someone else he supposedly loved. Although some might incorrectly argue this point, you cannot really know if you truly love someone within this short time span. Why? Because you really do not know him well enough to know if you do actually love him. Two weeks in simply not enough time to get to really know someone in any in-depth way.
It seems that you may have fallen “head over heels” in love with this person. The danger of falling “head over heels” in love is that you can become blind to many facts about the person and the relationship. If you are “blind” you may miss important red flags about a person or overlook certain aspects of a person’s personality or actions that would normally alarm you. Being “blind” in this way puts you in jeopardy of not being able to see the reality of the relationship clearly thus endangering your ability to correctly determine if the relationship is healthy or right for you.
Another concern is that you said he surprised you when he was under the influence of alcohol and acted out in a way not consistent with his character. He not only changed his behavior while intoxicated but he became physically violent, as per your letter. Since you did not mention what exactly happened I can only speculate but you did say that you were hurt. This is not a sign of a healthy person or a good relationship. Yes, he was intoxicated when this occurred but this is not an excuse and it should serve as a red flag to you.
You also mentioned that he voluntarily decreased or stopped his drinking and this is good. But it will be difficult for you to determine if you he is going to keep his word since you have only known him for a short time. I guess only time will tell if he stops this behavior and hopefully, for your sake, he keeps his promise.
In summary, my overarching concern about this relationship lies not necessarily with him but with you. Why are you so willing to stay with him no matter what happens? In the very short time you have known him, you two have already fought, you were hurt by him indirectly in a physical altercation, he is already emotionally distant and unresponsive, and he has indicated to you that the relationship may not work. This is not a good beginning to a relationship. Where did you learn or who told you it is okay be treated by someone is this manner and be willing to stick around for more?
Maybe this relationship will work out but is it more likely that it will not, and maybe that is for the better. The relationship has not had a healthy beginning thus far. Think deeply about if this relationship is right for you or if how he treats you is really what you want, deserve or expect.
If you want to ask a more specific question, please consider writing again. Take care.