Cant get off... HELP PLEASE

So.. I've just had sex in October of not getting any for a year.. me and my SO have amazing sex. he does everything amazingly. but... I can't seem to really get off... privately masturbating isnt really a problem.. but when I'm in the bedroom it's hard to. plus I've never really or I don't know what an orgasm feels like (by enteral gspot).. I've had ideas of using a vibrator but.. I just don't know if anyone has any techniques or... remedies.. idk anything that could possibly help?

PS:.. I was sexually molested for years from the age 3-10.. and didn't know if that would be another cause of this sexual dysfunction...