fell for my childhood friend but am dating someone?

Long story: so I know this guy A since we were 6.When I was 10 I left Romania and moved to the US.That is when our friendship ended and we went our separated ways.I have grandparents in Romania,would visit them every couple of years and that would be the only time to see A and my friends there which I have left.4 years ago was the last time I saw A until this summer I went with my sister on a 1 mth trip to visit the grandparents.A and I met up once,we hung out for 4 hrs of so,talked,he was very polite and courteous,asking me where to take me yet me not having been there telling him to suprise me.He is the son of doctors and since little has been spoiled in one way or another.When we hung out we had a great time but his questions of my dating,his remarks on how long my 4 yr relationship is and so forth made me question him.I brushed that aside but had a great time,we added each other to fb and chatted on that.We were supposed to meet a second time but circumstances made it impossible.I get back to TX and realize I like the guy,him and I chat on fb a lot and he leaves on a trip for Slovenia to hike and while he was gone I asked him a question abt our friendship etc.He replied how he sort of became attracted to me this summer etc..I told him that I think I fell for him(liking wise) as well but we both promised that our friendship would be #1 no matter what.Time passes and then our friendship ends in a fall out,I do not talk with the guy for 6 weeks and wish him happy bday on his wall on fb,he replies and we pick up fr. there...Ever since we have been on amazing terms we have...Before I took what he said as more than maybe what it meant but now I take it at face value.In the meantime I met a guy named J who was a friend and then we ended up going on 1 date and dating...He heard a lot abt A and me liking him etc...J and I somehow are dating for 3 weeks almost 4...Our relationship is shitty,we do not get to spend a lot of time together,he does not challenge me which I have told him and he is always busy helping is brother or sister or someone do something...I am at the end of my ropes..A and I chat on fb chat almost daily or when time permits,we flirt and he made a comment of calling me sexy.J fipped out abt that and it just drives me insane bc I told J that I just take what A says at face value.Last time I talked with A the convo was way off...We had almost nothing to say until the ice was broken 20 min later..I asked him to ask his mom abt some symptoms I am dealing with health wise,he asked me if I saw a doctor and I said yes(I have been dealing with vertigo for 2 weeks but have no fluids in my ears..lite headedness and dizziness simultaneously for 4 weeks)..He asked me if I was on a diet etc..Then I told him that I think he has a rt to know something..I finally told him that my 6th instinct is telling me not to tell him so he said do not say it otherwise you will be paranoid but I had to tell him:I said look I am epileptic..That is why I do not drink alcohol etc...He said "I know"..I had to do a double take and realize that I had a seizure when I was 6 or 7 at his parents' place when playing with him and his sis..After doing some blood work I fb mess him the results and he said take care and I hope I get well and to tell my parents...(my results are normal even though I am still dizzy!)...I do think I scared him away..My bf and I argue a lot abt me talking abt my friend,Idk what to do or who to choose,I know that my friend is overseas in Amsterdam so what is my best bet?