Orgasm during sex

Hope this isn't weird! My boyfriend and I have been having sex for about 6 months and I can't seem to orgasm during it. I've been told it's hard for a lot of women to orgasm from penetration alone but even if he tries clitoral stimulation during penetration, I still can't orgasm. Maybe I'm worrying too much about orgasming that I can't? I'm not sure. It's frustrating for me. Any insights or tips?