Why is it when you get married to a girl everthing goes well at first and than everything starts to fade away?

In the beginning i thought i was in love with a girl and because of us staying together due to my surcomstances everything went well now everything is still the same but my feelings feel like it changed, she is still the same girl and i am still the same guy but i am just more attracted to other women. We are togther now for ten years and some of the smaller things that made the difference has fade away.It is now like if she says she loves you that it has no meaning because she tells you that everyday.Is this normal in a marriage or is it that i lost interest in what i was looking for than and what i am looking for now?

If one really loves someone then it never fades. You probably got attracted to her because of some visible things- sex appeal, her looks, manners, may be money but you did not have love; it was rather lust in the beginning and when the sex drive eased, you reverted to the original you. I may sound cruel but it is too late now. If you did not develop real affection after being so long with her, I doubt love will happen in the future.