Is Your Fiance A Dick?

I really am at a hard point in my short relationship, we have only been together for under a year, and engaged for a few months. I would like to know what to do to make the problem less of one, and be able to hold my own side that he will respect and understand. Most all of the time I really get along well with my fiance, but at times he is totally a typical male. He seems to assert himself in a way that is overpowering and way too harsh. It is his way that goes, and if you have your own opinion opposite of his and you end up bringing it to his attention in the conversation, he sees you as overreacting (by mentioning that he makes you feel bad about how he treats you at that moment, and then minimizes it by pointing the finger at you being the problem). I feel like I want to crawl in a little ball and disappear sometimes. His being an only child probably makes him be this way, and it makes me think that somehow we will never be able to understand each other`s opinions, because I then get defensive also. He is really an alpha male in the human sense. A strong, self-employed, go-getter, along with the fact that he is a powerful businessman, though a part of the problem might arise from that I also work for/with him for our company`s sake pretty much every day in a week. We are with each other constantly in work and play, even though lately we cannot get a play break because the business is growing so much at too rapid a pace that we can`t seem to stay caught up with the workload. I nor he have any time to work on our relationship or our wedding plans. Though we did take a day and a half this Memorial Day weekend to look and purchase our first new house together, but it still was supposed to be vacation for us but we couldn`t take it away from the workload as we had to catch up so as not to drown and lose clients because we can`t keep up with the hectic pace. His go-getter, entrepenuer personality is something that attracted me to him in the first place, but it seems a little strong for me sometimes, I`m not an employee to boss around in every way of our lives, every day of our lives. When it comes to his point of view, there is no other way of thinking unless you make him feel bad by showing/reacting that he makes you feel so badly & such a small person next to his big opinion and personality. Do many prople encounter this as part of a marriage relationship piece, or is this something that I need to consider before making the next big step to the nuptuials? Please, if anyone has any insight, I`d appreciate the comments. Thanks!