How can I not depend so much on the person I love?

We've been together over 6 months and I am very happy with him but because of my BP disorder I get very emotional and hopeless and then feel too dependent on him when coping with my symptoms. When he's not around to help me I feel upset because I think that I need his help to feel better. This leads to worrying and fearing things that are irrational or insignificant about his feelings for me and then I make him feel bad when I don't intend to.

He is always there for me the best that he can but is not a very serious person and doesn't like to feel upset if he doesn't need to.

How can I become more independent resolving my depressive episodes and feel secure so that I don't worry about everything so much? I really want to make this relationship work and if I keep depending on him to solve everything I'll never be able to cope on my own. I'm also worried he will begin to resent me expecting so much from him.

I know he will always be there for me and that we are happy but somehow that just goes out the window when I'm extremely emotional.

Thanks for any advice.