thank you for entering the topic, and thanks for your time reading my problem and thinking for a solution.. I really need your help experts :)

she's a family friend, and she's the first girl other than my relatives that I knew in my life, we used to see each other in family meetings like every 2-3 years once! We always had those small conversations, until we grew and I saw her 2 years ago, after since, we've been getting close to each other, in my community, getting close = texting and chatting on msn, we can see each other once monthly, not pre-planned! I loved her so much, although 90% of our memories are msn conversations :S.. we used to chat over 9 hours daily.. and then I fell in love with her, deep love, she turned to be everything in my life, I thought of her 24/7, and I really loved every single detail about her.. and one day, she asked me to reduce our chats because its not a right thing! ( in our community, you shouldn't get so close to a girl before marriage ), I told her, you already know me, and know that a guy like me won't get that close to a girl except if he's considering proposing to her.. she answered me that she doesn't have any feelings to me, she likes me , she likes to talk to me, she even miss me, but she doesn't feel anything towards me, I am like her brother, but a brother she enjoys having him around.. that's what she said, and I believe she's honest about everything she says, after it.. I disappeared for a while and then come back and treated her as a sister, while she was never a sister to me, and after a while, I told her that! That she's not a sister to me like I was claiming.. now I took a decision and I told her I can't stand having her as just a friend.. and I decided to go away from her and stop talking with her, and she said if that was my decision then she respects it and supports me..

I really don't know what to do :)
please experts, advice me with the right thing.. thank you in advance, thank you for your time..

Regards,
Ahmed.

You already told her how you feel and she doesn't feel the same way. That's it. You can't force her to like you the same way.

Keep her out of your life until your feelings for her have gone away. Otherwise, you will have a lot of trouble moving on with your life.

Accept her feelings that she only sees you as a brother. It's time to meet new people.

i decided to go away from her and stop talking with her, and she said if that was my decision then she respects it and supports me..

That is your answer. What else can you do? You cannot make her care for you as you do for her, and it does no good to continue to talk to her. That will make you miserable.
Stick to what you know you should do, leave her alone.

Thank you for your help, you know what? I just needed what you said to be 100% sure of my decision :)
Thanks for your time, good luck in your lives too :)