Help?

Mary
So im new to the whole having sex with my boyfriend thing cause im in my first real relationship (im almost 18) but everytime we have sex no matter what he does i just dont experience an orgasm or any type of release at all. Im also very uneducated about this stuff and shy cause it was always kind of made into this really bad thing by my parents so im kind of ashamed for even being in a relationship that is physical. Any tips?