ahh, i guess you are still pretty young, and sometimes young couples have sex because they are curious or they just dont know how to suppress those horny feelings. but you should think about the future for both of you two, if you do love her, sex can wait, cuz a physical relationship never ends well. sometimes a romantic day out can be much better than having sex because you have needs. ask yourself this question "do you love her or do you love the sex more" if that still doesnt work, you can either masterbute on your own or erm at least wear a condom, lol i hope this helps