Why am I bored and lonely with out him?

I used to enjoy being alone, I used to be independent and knew how to get through life. I was never really bored. Now, I cant seem to enjoy life with out him. We have going out for over a year and a half now.

Why am I like this? I get so depressed, bored, and lonely when I am with out him? Why cant I enjoy being with myself??? Are we spending too much time together maybe?

And yes I love him, but it doesnt seem to help :/

EDIT: Thanks, But I cant spend every waking minute with him, its not possible nor right. So when I am with out him I get bored and depressed, which isnt good :/