I need some advice

I am Bipolar and I have a friend that is Narcissistic.

In the last few months, he's wanted to commit suicide at least half a dozen times, and is friendly for a while and then lashes out at me. I have always been there for him, even though I am battling with a depression phase.

I am now at my limit. I have said to him that I do not want any contact until I am more stable, and that I will contact him.

I wasnt able to understand this, and couldnt understand why I am having to do this. He has turned up on my doorstep, within me inviting him. I told him the timing wasnt good and that he could come the following day. The next day, I had to cancel because I was not feeling good, so I sent him a mail, not to come. Anyway, he turned up but I didnt open the door. He was ringing the doorbell and throwing stones at my window for about 20 mins.

Then I get a phone call from my sister (it is now 10.30pm), he's turned up at her doorstep, saying he's worried about me. I told my sister, that I am at our mum's. She told him that, and that I was alseep. He spoke with her about how he is feeling (depressed) and how much "he" needs me. He then comes back to mine and leaves a package.

A few days later, we spoke briefly online, and I said that I was going to bed because I was tired. He then drives to my place (which I didnt know), and I receive an sms at 01.03am saying, well I wont repeated it but it wasnt very nice.

This was the last straw for me, and thats when I said that I do not want any contact.

That hasnt exactly worked. On another website, he kept clicking on my profile (It shows when someone clicks) I had to block him ats I had the feeling I was being stalked.

He is quiet for a while, and then tries getting in contact. This started again the other day. He calls with a number I do not know, crying as he is on his own and the girl he has been talking with (he is 33, she 15) isn't replying to his messages. After this, I then get an sms saying that he needs me, I ignored that. Then I get a message here, saying the same but now it is serious. I didnt know what to do, and spoke with my sister who said ignore him.

My sister has also had contact with him asking him "nicely" to leave me alone until I am ready to contact him.

I have also spoken with his mum, and she understands that I need a break from our friendship.

If this carries on I will have to break our friendship.

Can anyone give me some advice.

Thanks