My 1st post, pls support!

My name is Edson, a few months ago I met a girl name Eve, I know I
have feelings for her, but I know she dun like me, She and I
belongs to 2 diff worlds, but why do I still like her? Well it
cant be explain right? I never told her my feelings afraid that
she might avoid me and end up in the end I cant even get to see
her!
I know I cant be with her but I know as long as shes happy, Im
happy!
At the other hand, this girl name Helen, shes was my Ex,
We break up a few years back, she was a nice girl and we had
wonderful time together in the past! Thru her language I know she
still have feelings for me. I also miss those wonderful times she
given to me!
I know feelings cant be share, but
.. Im really lost,
Does anyone ever have any similar Experience like this?
Should I start afresh with Helen and keep Eve in my heart till a
day I forget about her? Or
Forget about Helen and continue to keep the feelings for Eve?
Ill be grad if someone here can help!
Thks..