Maybe you would first like to speak to him? If you are not getting your pleasure from intercourse, the least he could to is to try to pick up cunnilingus and improve on his foreplay, such that you would be in a heightened state of excitement before he penetrates.
You should put it seriously to him, have a heart to heart talk. If he is concerned about your feelings he would make an attempt to learn more techniques to improve himself rather than to have u run here asking for help.
I think having a guy bonking his gf and teaching him wat to do isn't going to do much for his ego....