Im 16, have sex 3 times a week, my bf has a big penis, while intercourse my vagina pains, how to stop it?

Gentle with good lub: The described scenario happens to few women, but gentle entry with good lubrication will timely dilate and loose the vaginal tightness except occasional few having painful vaginal spasm (vaginismus); if so, see gyne-doc for counseling and rx timely. For the time being, need to communicate with your bf for passionate cooperation, and be gentle; it not, just need to stop if unbearable. Best...