I really need help !!!

Cynthia
Me and boyfriend been dating for a week now but we were friends for 3 years. I'm not happy in the relationship. It's really confusing . When I'm with him it's different he treats me like I'm his girlfriend but when I'm away from him he treats me like a random girl who just bothers him . I know I'm not the girl who he usually dates. Pretty much we are two different people. Sometimes i ask myself why he ask me out. The relationship is not what i expected to be . I feel like i should end the relationship but i really want to be with him. And i know it's barely a week with him but i don't know what to do. Please someone help me