Neither. My best advice is to take as long as you need and get there or very nearly there before
penetration. Manually, orally, whatever. And if he finishes still before you
orgasm, he should see that you get there after. There's more ways to have an orgasm with a partner than by
penis and it still 'counts' as WITH your partner.
Keep in mind. MOST women can't climax from intercourse alone. It's perfectly normal. Even if he lasted longer, you might still need other kinds of stimulation. There's nothing at all wrong with you!