I don't feel anything during sex what should I do

There are many things that can cause this.
Please provide details on you and sex.
About your preferences, about your BF preferences.
About foreplay (did he ever hear about that?)
Are you perhaps too wet, or too dry?
Do you feel pain during sex?
Are you too small or is he too small?
Does he know how to satisfy a woman, or is he just lazy and only tries to satisfy himself?
Etc. etc. etc.

;)