Really Worried about DS

[Hearthurts]

I'm just after some advice to anyone who has been through similar.
DS is 20 and up until last week I thought he was happy with life, has a good job and goes out with friends.
I bumped into his ex last week, they are still friends, she said she has seen him recently a few times, he's been crying, saying he can't go on. She thinks he needs help. she said another one of their friends has also been having heart to hearts with him and they don't know what to do as he's so down.
I'm just devastated, he has seemed happy at home. How can I have missed this? I've cooked him tea tonight and asked him if he's ok, he insists he's fine. He's been in his room ever since watching tv. Doesn't even want to come down to watch footy.
Also,to add, in the summer I found some drawings he had done. They were very macabre, daggers, death, phrases from songs about love and death.
I'm so worried, I don't know what to do

Don't ask whether he's ok, tell him you know he's not. Instigate a conversation when he can't retreat, maybe on a car journey. If necessary, tell him you found the drawings and/or his friends are worried about him. Tell him you're beside yourself with worry and want to help. If he won't talk to you, convince him to see the GP. If he won't talk to anyone, you need to talk to someone for advice.

Going to speak to him tonight, he looked so pale this morning