watching porn make it harder to orgasm?

Jordan
So I started watching porn when I was like 12 or 13. I started masturbating and orgasming around then too, right after I hit puberty. I didn't watch porn when I masturbated though. Today I still can cum or orgasm when masturbating without watching porn but most of the time I do watch it because I like it. Now with any sexual partners I've ever had I haven't been able to orgasm. I only started having sex with partners a year ago. I'm curious if I'm just too used to getting myself off that I can't with a partner. Or if porn might be an issue here. It's really frustrating to not be able to get off with someone so I'm trying to figure it all out. I've never used toys either. I've had someone tell me it's all in my head because I can't let go but I'm not so sure that is the full reason. Anyone have advice or experiences?