Falling apart

I have just discovered this forum and am hoping that i can find some people who have simillar experiences as myself.

4 weeks ago my then partner decided to end our relationship, he suffers PTSD which has turned into somewhat chronic depression.

He asked that i remain his friend as he feels as though if i didnt he would have no body.

I am upholding his request and trying to support him the best that i can. He has not done anything to hurt me in anyway and he believes that ending the relationship is better for me then me continuing to live alongside him and his depression. He feels he is not worthy of somebody doing that.

He has expressed alot more since we have seperated about his feelings towards different things that have happened throughout his life and i guess as such contributed to how he feels today.

Taking out the relationship and looking at this as even just a friend, sometimes it is very difficult. I dont know what to say or do to some of the feelings he tells me.

I am new to this forum its my first post. I am unsure how much information to give, but i am hoping there is somebody out there who has some words of support or wisdom for me.

Thanks in advance