boyfriend wants to finger me

Kaylee • 💍05.26.17💍•Bipolar bitch🤘🏻•Clean~3 months👼🏼•Could be pregnant?!
So me and my boyfriend have been dating for a month but we've knew each other for 5 1/2 months! 
I'm 15 and his 16 and he wants to finger me and you know eat me out. I'm really self conscious about the down there area and I keep telling him no and he gets upset and doesn't understand! Anyone know what too do? Or what too say