What to do with the husband?

I married my hubby after dating only 3 months. I got pregnant. We've been married for only 4 months. It was a short courtship and I wouldn't have married so soon, except for the pregnancy, which we are excited about, but I always feel I rushed into things. Much of my angst has to do with finding out that my hubby liked many women--who are all his friends and my friends. Well, past is past, but whenever we bump into them, he always acts like he's infatuated with them. He literally gawks at the women. When I tell him about it later and we argue, he acts all innocent, begs me to forgive him for any harm done, and then repeats the whole thing. I'm getting really tired of this. But, he will insist that it was not gawking--and then make up by doing something really great. While, I appreciate this, I don't know how long I can go on like this. Why does he even do it? It's so annoying.