Is it normal not to stop thinking of him

I fell in love with my best friend (i know for a fact that's normal) and told him so too. He said no to me and i din't mind it at that time. everything was going great and we were still the bestest of friends. All i ever asked him was why he rejected me and he gave me pretty vague reasons. i still loved him at that time one very fine day about three months later he told me that he loved this other friend of mine who also happens to be his best friend when all of us were together, now the problem is due to some circumstances she cannot reciprocate back to him, so i thought i still had the chance. on the night he told me he loved her I tried to talk to him but he kept trying to sort out things with her. In the following weeks and days we kept having problems some so huge that he started acting abnormal to me. i would like to say it was all my fault that it kept happening... actually my problem was that he was behaving in a very strange fashion after he told me he loved her. I kept trying not to fight to him but it just kept creeping up... it came to such a point that he resorted to being sarcastic to me and not taking me seriously at all. And the main problem for me was our mediator was the other girl. He was very clear that if i gave him time he might become normal again, he might even love me back...me being the psycho i was kept trying to smother him..it reached to a point where he told me that after seeing each others worst side we definitely can't fall in love with each other..but he will surely be the best friend he was to me before. Now a few days back i took up a decision to be extremely normal to him and give him time and space, but every time i try talking to him about something normal he ends up the conversation by saying something that hurts me. We both promised each other that we will be quite no matter what the other says, but i had to say something to him about his behavior being the idiot i m.on the day i left college to go to work i told him i won't call him unless he really really missed me and i was gonna change my number but due to some really sweet things that he did for me in the last minute i couldn't do so..while talking to him some things led to another and he finally told me that I never keep up my promises and that if i kept telling him i wasn't gonna call i should've stopped or not told him i was gonna do it at all. Now he doesn't wanna talk to me for a month to set things straight between us. He feels that I've made him do hurtful things and also he can never be expressive to me ever again. He cannot guarantee me the relationship we had before, he also said things like i should be able to take anything he does to me but he can't do the same and so many more hurtful things. but he also tells me he just says stuff in the heat of the moment and forgets them. I have a feeling that everything will workout between us,so m still holding on to the relationship. Is It Normal