Why Am I Unable To Enjoy Intercourse With My Boyfriend At This Time?

Hi,

My name is Siarra. Im a senior in High School and i have a question about my sexuality. Recently me and my boyfriend decided to have sex and ever since my first time, i have been having trouble trying to figure out why i dont enjoy sex as much as he does. Now, I do have a little medical history such as on and off yeast infections but even at the moment when they are or are not gone, i still dont feel pleasured. Can u please help me understand whats going on with my body?