I can't orgasm with my partner.

My partner and I have been together 6 months now and I still haven't had an orgasm with him. I can only orgasm from clitoral stimulation and can do it just fine when I'm alone. I have gotten very close and have squirted using a toy with him once but that's it. It feels good but it feels like I get to a certain point and can't get any further, like hitting a wall. I'm thinking it might be a mental thing, anxiety about being vulnerable and insecurity about how I look during it. Idk. We're still trying to make it happen but I'm definitely getting frustrated. I love him, I'm very attracted to him, it just doesn't make sense. Has anyone else struggled with this and how did you overcome it?