wth is going on..one minute friends,then strangers?

RW!I know this guy A since I was 6...I was close to him and we grew up together and were childhood friends overseas.In 1995 I left for the US and left all my friends overseas so in other words my friendship with him split.I came 4-5 years later,we were both in JR HS and he was changed!He smoked and hung out with the wrong crowd etc..I saw him 4 yrs after that when in HS and then 4 yrs later and so forth..Last time I saw him was 4 years ago when I visited my grandparents.I know his parents especially his mother since she was my doctor when young and now is the family doctor for my grandparents who live overseas(she helps my dad's parents).Anyways so this summer I hung out with A one time for like 4 hrs,we talked,laughed,etc..We had a great time and texted each other when we could..The second time we hung out he had to cancel b/c he had some wisdom tooth ache and I was ok with that.The worst part is that I had to see his mom the same day when he canceled to give her a present fr. my parents only to have to see him and his mom think that I had something to talk with him abt!All in all it was a confusion.Anyways him and I added each other to fb as friends.We started to keep in touch even overseas while I was there etc...So anyways I get back home,US, to realize that I fell for this guy in 2 weeks!I had a 4 yr relat which ended last yr and was thinking "How is this possible?"...Anyways A and I kept in touch,we talked about simplicity and simple lives etc,he went on a 1 week hiking trip to Slovenia and I wrote him some messages.I literally implied in one of them abt the change in our friendship which he picked up on and he wrote me back saying that bef he never saw me as a gf but this time when we hung out he did and bc of how I was and acted etc..I wrote back and was stupid to tell him that I liked him..I made sure that our friendship would not be affected at all no matter what!In the end our friendship is still here which is good but he said that it is ok and then we talked something abt a gray zone which threw me off since I never heard of that expression before.I said how I was confused.He became frustrated and wrote me how him and I are almost strangers since in 15 years we had one actual conversation which was this year when we hung out and so forth..When I read it well it hurt me so bad because I did think that he was my friend thru thin and thick!4 years ago we talked and caught up,we hung up and now all of a sudden he sees us as strangers?He went on to say how we should just be relaxed and friendly not be blut,get to know each other and find common interests and a common ground..We now tell each other what happens in our lives minus the personal stuff,funny stories,recc. to each other books,etc to see,discuss places to travel to and so forth..The other day we were both on fb chat and I said hi to him..We chatted for a while..He knows that last week end when I wrote him on fb a mess I included a part of how I was asked out etc by 4 guys in 2 days which was annoying or I posted it on my wall!Anyways so he asked me how my bfs are..I said that I turned them down which I did,he asked me why and I said b/c and I went on to tell them that they wanted to me their world which I did not want to.We spoke of cities,traveling,etc and me training for half a marathon and then he logged off..he was logging on and off and then finally off!WTF?He asked abt who I am dating rt?He said that we are strangers so why does it matter to him?He keeps on saying that if we want to make something more of this to be more relaxed and friendly...More of what?He called me a stranger and now asks who I am dating!