Yes your personality change when you marry. Not in a negative way. If you are a happy person before marriage, you will be happy after marriage, but changes in our lives demands changes in our person. Where you use to go out with the girls once a week, things of married home life may prevent you from going out as often. Just as we have to adjust to things that change in the world, we have to adjust to a new style of living. I am not saying to drop your friends or you dates, just that it may not be at a time that is good for your family. This may cause the friends to think of you differently if they have not experienced married life or if they have been in a marriage for a long time. Hope you understand what I am trying to say. It is the best I can do. Best wishes.
Well, I think it all depends on the person. Who you marry is one of the most important decisions you will make in your entire life. This is why you should make sure that you really do know the person you marry before you actually marry them. I myself am married and the woman I married has only become more lovable since then. Yes, every marriage will have their struggles, but you need to remember its "for better or for worse." I hope this helps.