How can I get him to be my boyfriend officially?? I'm in upendo with him...

We have been kinda seeing each other for 9 months,, not dating like in a relationship,, but we both agree that we have deep feelings for each other and we have been intamit he was my first,, but he didnt want to tarehe because he didnt want to brake my moyo and he was going to move,, (he's gone already) we still have contact but i'm afraid he doesnt have feelings anymore for me,, and we made a deal of a 50/50 chance of trying to end up together if the time is right,, but he was really negative about it and alisema the chances was really scarse that we would be together and that i should kind of songesha on,, and i dont want to,, i only want him,,, please i'm desparate please help me get him officially to be mine