What do you do if your husband has fallen out of love with you?

I've been married for 4yrs. About 3 mths ago my husband began to express to me some unhappiness in our marriage. I knew he was unhappy in his job & he was somewhat depressed. We both saw a counselor separately & jointly and things began to improve. Then things begin to revert to where we were before counseling. Then my husband finally comes out & tells me that he is no longer in love with me. He said for the past year of our marriage he had fallen out of love with me. Of course he gives me no reason & says that I've done nothing wrong. He swore there is no one else, & I believe him. He told me his dream is to have his own apartment & to be able to come and go as he pleases. I just feel cheated because when he first become unhappy he did not express that to me. I've only known 3 months that he wasn't happy in our marriage. Well, now he has decided to separate. I just feel like we haven't tried enough to make it work. Is there any way he could fall in love with me again?