My aunt are really good friends with her neighbour.She would always come to my house during every function.My Aunt's Neighbour has two daughters.They're 18 and 14 years of age.I'll try to explain the best I can so I'am gonna put the older one as NU and the younger one as NA

I fell for NU the first time I saw her.And first time I saw her was eight years ago when she and me was 10.but I've never actually spoken to her.As time pass by,my feelings for her,although is still there,it's not that great.And no matter how hard I try,I still can't get her out of my mind

In time,I was very slowly moving on and that the memory of NU is slowly fading from my thoughts.But A few months ago,during a function,my cousin told me that NA has a crush on me and she wanted to get to know me.I played along,thinking that I'll only befriend her and thats it.But just a week after getting to know NA, I realised that I'am falling for her which also revives my thoughts of NU.But when I heard that NU is already with somebody else.I got together with NA to keep my mind of NU.

Now,me and NA are together but I can't stop thinking of NU.Cause NU was the first girl I fell for,since I was 10.I know most would suggest that I break up with NA and just go tell NU how I feel about her.But there are obstacles.Firstly,its too late for me to tell NU now since she already has somebodyelse and I'am already together with NA.Secondly,I feel so guilty for not being able to stop thinking of NU when I'M with NA.How do you think NA would react if she knew.I don't want to hurt NA but I really really genuinely love NU.

What do you guys think I should do?
I'am getting so depressed cause they're not the only ones that is on my mind since I still have work,school and driving lessons on top of that.And thinking of them,I can't concentrate on any of that

Your problem seems to be a conflict between imagination and reality. And reality always wins.
Past is past. Enjoy life.

But the past is a ghost which never seems to stop haunting us

its just a matter of time mate.