Help! Am I alone or is it normal?

Ever since I was Rape three years ago, I haven’t been able to truly orgasm by someone else. I can make myself have one but I haven’t been able to do so when I have sex with someone else. Not only that, I haven’t had sex with my boyfriend as much as I did before the accident… I feel so lonely sometimes and feel like I am alone when it comes to this. Is this a sexual dysfunction? I just feel shameful. It comes to the point where I masturbate when my bf is not home because I feel like it makes him feel bad. I just can’t have sex with anymore….