Hello, I'd like to help you with your question.
It could be that the man you are dating is narcissistic. He certainly displays some of the traits of narcissism- focus on himself, ignoring your needs, etc. But it is just as likely that he is Bipolar
. What you describe sounds like the manic phase of Bipolar disorder. That can explain the intensity of his actions as well as his inability to focus on your needs.
Whatever is going on with him, your feelings about this relationship are important. You certainly cannot stay with someone who runs the relationship based on what he wants and ignores what you want. The person you are is being edged out and his personality is taking over. You are right to be concerned.
Because he also has such good traits being kind, loving and generous, you may not want to leave just yet. If he is willing to listen to you and is willing to work on this issue, you may still be able to be together. And he can work on developing this side of himself.
One thing to find out is whether or not he has sought help to deal with his issues. Running over someone in a relationship and being intense enough to want to marry you before he gets to even know you well says there is more going on than he is in love with you. His personality is all encompassing, which is usually a sign that there is a problem. If he is willing to seek help, or already has, that means he recognizes he has a problem and is willing to work on it. That says a lot about his potential to overcome these issues and be a better partner.
You may also want to back off the relationship a little bit Let him know that while you like him, you need more time to get to know him. Limit his contact with you. Tell him you are only available certain days. If he calls and you talk, then end the call with "talk to you.." then tell him a certain day that it at least a few days away. If he calls before then with anything but an emergency, then cut him off gently and tell him you will talk with him on the day you named. By doing this, you gain some control in the relationship and you can also see how he reacts, which will tell you a lot about whether or not you should stay with him.
I hope this helps you,