>>3959
>whenever i want to draw i never have any ideas,
Try some drawing idea generators, like these;
http://alexanderlozada.com/resources/psuedofolio/ - lame as fuck but very straight forward
http://artprompts.org/ - requires you to chose a subject before it generates an idea about that subject, picking a subject is a hurdle that can fuck up for you.
http://www.magatsu.net/art/index.php - this one is probably the shittiest I have ever seen, (I got "brown" as my drawing idea...) but who knows, maybe you have better luck than me with it.
>or when i do know what to draw i always get sad because i cant do it
Who gives a shit whatever you can draw or not? WHo is going to see your art anyway you, like all of us, will only show people your art after you've become good not before.
Now get our there and draw! Also post your shitty art here so we can help you get better.