Break up dilemma

My ex boyfriend broke up with me 2 weeks ago. He is going through this really hard time, like he just feels alone all the time, doesn't know his place in the world, nor can he see the purpose in it. He doesn't want to be alive anymore. So he broke up with me, because he said he didn't want his entire high school life to be this relationship (We started dating the summer before his freshman year and we had been together for almost 2 years) and he needs to find himself. He said he doesn't know who he is and felt like maybe it'd be best for him to be single and figure himself out.

I'm okay with the break up, I can't expect to have one of those wonderful high school sweethearts stories those are very rare. The problem is even though he said he wanted space so I haven't talked to him face to face or heard his voice in 2 weeks, we still text. And he keeps telling me how he still isnt happy. We were best friends before dating and we wanted to stay best friends after which is why we still text and hope to one day when he is better and more stable to be able to hang out like friends again. Sometimes that doesn't seem possible anymore but I just want him to be happy. So here's my dilemma, honestly I am not over the breakup yet but I really just want to be a good friend. I want him to get better, I want to give him a hug (as a friend) and tell him everything will be okay. Cause seeing him be this depressed and not being able to do anything myself is so fustrating. But maybe I should leave him alone? Do I keep texting him and listening to him rant and talk about how he's feeling? Or should I stop texting him completely (though it worries me things will only get worse if I do)? I don't know what to do :/ I don't know if I'm doing the right thing or if i need to back off or what i should be doing at all