Problem related the menal thinking.

Dear doctor i would like to discuss my problem in detail.. i would like to share my problem this is certainly a mental issue or problem i was in relationship or you can say i am in relationship as now as well.. i am 26 young doing work in real estate sector i love a girl and so as she.. we both want to get married so she told her parents but her parents denied for me as our horoscope and caste doesn't matches.. initially i was not accepting this thing but later on i later accept that.. the girl doesn't want to go against her parents.. so we both accept the decision. but the girl is saying or we still can good friends for the whole life.. but my question arises now will it be possible for us to keep friendship further.. and how can i change my feelings for her.. so doctor help me by knowing that by what method i can change my feelings for her.. please describe in detail..