How do you know if a Pisces male is really interested in you?

It's hard to say... Pisces generally don't really know what we want till it smacks us in the face. I'm a Pisces and sometime I flirt just because I like to flirt...if someone is interested in flirting with me, I'll flirt like there's no tomorrow. Anyways, only way to find out is to ask the dude straight out...you don't have to worry about the consequences, Pisces work hard to keep people happy.