I'm pretty sure I'm using depression to get the attention of a girl.
That seems manipulative, why are you trying to get her attention?
I don't feel like I'm getting the attention I need. It's raining outside, I want to be with someone right now.
It's not right to fake an illness just to get attention. You should always be honest with people.
Dude, I'm fine. I've been doing this for years and everyone is aware of it.
Depression is a very serious illness and faking it is manipulative and makes light of something that people truly suffer from. You should try to form relationships based on honesty and truth. Chances are you will have better success.