Guilty

Whenever I masturbate I will get close to having an orgasm and then I just can I feel guilty and like what I’m doing is wrong and I can’t stop myself from feeling this way and I don’t know what to do. Like I can have sex with my boyfriend and he will make me orgasm and I will feel no guilt or shame but when I masturbate I feel awful and still will be so horny. I just don’t know what to do