Mrs.marin,
Both parties should try their best to sustain the relationship. If you wanna to be successful, both of you should work hard. If you think your marriage is miserable, you might have to find out the problems and try to solve them. You have the right to decide whether to live with him or not and we can’t help you make your decision. And of course you can change your life if you’ve made up your mind and will do whatever to achieve your goal. To be happy or unhappy is your choice. Just be sure about yourself.