why it is tough to ignore one whom I once thought to be my best friend?

You are doing all the right things to get out of this situation. The only thing I could see here is you are entertaining his calls. Eventhough you know that he is going to say the same thing, you are picking up his phone calls. You shouldn't even attend his phone calls. I am sure he is going to dial you from unknown number, you could pick up the phone but as soon as you realised that its him, you should just hung up the phone withouth thinking anymore. Apart from this just be normal with your other stuffs.Time is the best medicine for everything. All the very best. Take care.

Wow... somebody with exactly the same problem as me!!! I've been finding it difficult to forget somebody as well. The trouble is, he's not ignoring me entirely; he's trying to coax me into talking to him again and that makes it increasingly difficult. I'd decided that this was the last time he was going to "sulk" and not talk to me for a while, as it's probably the fourth time. I gave him a month to come back... he owes me the apology, not I him. I have gone back to him on many instances before and with the support of my friends, made the decision, this time, to give him space and leave him to make up his own mind. I still feel he might come back... I know he cares but is stubborn. So.. after six weeks of this, I am starting to heal.. no, I won't EVER forget, but I can look back with a little more happiness and cry a little less. I just have to move on. We can't MAKE somebody love us if they don't. (A famous Norah Jones song) lol. If, however, this is your first time of being ignore, there's more hope. I would just drop him a little note, or text message each day saying how you miss him and can't forget the times you spent together; how unhappy and lonely you feel without him around, and see how it goes from there. It used to work for me... he came back every time, but I'm just tired now... I don't have the strength to do this constantly. You, however, might be able to work it out... I hope so. You can only but try, but if he's adamant, then you have to move on. You do have a life of your own to discover and live. I hope all goes well for you and this guy will see what he is missing. Brightest Blessings.

I guess it would depend on how much you really want him out of your life. If you are serious then delete his name off of your messenger. Block him as well from your messenger and email. Do not answer you phone when he calls. In time you will get over him. However it would seem to me that you don't really want him gone. Perhaps talking it over with him and being honest about how you feel and how he feels will be a better understanding to both of you. Good luck.