Many students get very confused about the difference between -ing and -ed adjectvies: interesting / interested...

Adjectives ending in -ED have a passive meaning (receive the action)
- A painted door = a door that has been painted
- A destroyed city = a city that has been destroyed
 
Adjectives ending in -ING have an active meaning (do the action)
- The sleeping boy =the boy that is sleeping
- Falling leaves =leaves that are falling

To remember this difference easily, just memorize this example:

A boring film makes me bored     /ə bɔ:rɪŋ fɪlm meɪks mi: bɔ:d/ 

When talking about people, remember that -ED adjectives describe the way you feel:

I'm confused, I'm excited, I'm bored, I'm terrified, I'm worried, I'm fascinated, I'm tired...

Comparing:

Politicians are very confusing, I'm always confused when I hear them.
I feel very tired, today I had a very tiring day
That book was depressing, now I feel a bit depressed
That's an astonishing painting! I'm totally astonished

Her eyes are amazing
That story was fascinating
This job is exhausting
I hate the dark, I'm frightened
I'm excited about our next trip to Viena
I need some rest, I'm totally exhausted