I'm not sure how to make a vow of abstinence, could anyone help me?

its ok to make an abstinence vow if tu are not one. abstinence is not only link to Christianity.
to make a vow, find someone who tu would trust, a childhood friends who tu are close with would be ideal. tu could ask your parents but i would suggest not. it hard to explain why but its just better if its a close friends. when tu make your vow, whatever relationship tu are in, u are oblige to tell that person. whatever tu do in that relationship tu have to tell that person not in specific detail but in brief. so the person can be accountable for whatever actions and consejos you.