What should I do with my Boyfriend? Do you think he's cheating on me? Or what?

[Sky]

Ok so here's the problem.. I have a boyfriend, and we're "Long Distance Relationship" and One night, i had a dream about him cheating on me. And when I woke up after having that dream, I feel that he's cheating on me, so I send him a message on facebook. I told him to give me his facebook password and i'll give mine. So after giving his password to me, i logged on to his facebook account, and opens his messages, and he deleted all his messages. And so, i had a feeling that he's cheating on me. And I feel cold on our relationship because he does not reply to any of my messages and he does not say 'I love you' anymore. So do you also think that he's cheating on me or i was just thinking negative? Sometimes I just want to break up with him, but i can't cause I love him.
And yes, i've met him in person.