what should i do in this terrible situation ? I am depressed because of my ex boyfriend?

[Sania]

I was continuing sort of friendship with him (ex boyfriend).
He was behaving good to me , but suddenly he has chnaged. He used to treat me like an option , wasn't interested as much i was, i always kept chasing him and mostly, i was the one to initiate contact to him.
Now suddenly , he has stopped texting me himself and has started ignoring me. It is hurting mr now. He always does this to me and when i say him all that , he says i am important for him , he cares for me , he doesn't want me to leave him , etc.I don't get him , if he wants me still then why he treats me like this.I did text to him two times but he was quite rude, he talked to me in just two messages (uninterested way).
I'm caught in a fog of depression and I just don't see the light at the end of the tunnel. I feel like I will never feel normal again. I don't feel like myself anymore, and all logic is gone.

Do i need to leave him all alone now ?
Cut off all contact on social media , mobile /?
When i decide to leave him , he doesn't let me go and says he wants me not to leave him ever , i am an important part of his life.

[First]

I think he still loves you. maybe you 2 should get together and have a serious talk.

[LifeOffTheRails]

This guy is hurting you and no one needs that kind of negativity. It is best to just cut him out of your life. Tell him that he is hurting you and you want to break up. Then if he wont let you go, then just cut him off. You do not need to have that negativity in your life.

[Kimberly]

maintaining a friendship after a break up can be hard at first trust me. You guys should really talk about this in person and alone. figure out how you both feel about each other