New sex positions to orgasm

Gemma

So me and my boyfriend have had sex a fair amount of times but I haven't been able to orgasm when we have vaginal sex. I'll rub my clit while he's inside me and I'll feel soo close but I can never reach that climax, he's lasted so long sometimes because he really tries to help me reach it but I just can't. Any advice on sex positions to help reach my climax or even the g-spot?

Update: Orgasm reached during sex!! Thanks for the advice ladies.