My story it might be long but ineed help...?she will stay in my memory for the rest of my life..!!!?

two years ago iwas just graduated from high school and went to an institution ....iwas just studing and going forward then one day agirl that studies with me in the same group came to me with her friend(agirl) and they told me that they had aproblem with one of the teahers and isolved it with them idont know why they came to me exactly but she said they can trust me and after that we kept meeting each other(and spend most of the morning and afternoon together me and her became close friends we were tellin each secrets and other subject that we dont tell any body and if one of us had aproblem he directly calls the other we remained for 2 years then she loved someone & our friend ship was at stake we kept fightin and ten return until iasked to be seperate ways for the two of us and now ifeel so empty inside ieven forgot how to deal with other girls icant forget her and iwant our friend ship back but idont know if iasked her she will agree afraid that she says no...what can ido