<human>: Can you condense the text into three sentences or less?

Due to the fact that I grew up in a Christian family, I have been brainwashed into believing that sex apart from marriage is wrong and sinful.  During college, I became heavily involved in ministry and even became a bible study leader in which I taught this purity message to other girls.

My beliefs have changed in the last few years, but I am having a very hard time leaving that negative connotation of sex behind.  I lost my virginity to him a few months into our relationship which was a huge step for me and something I never ever thought I would do.  The feelings of guilt and disappointment were very overwhelming in the beginning and I was under the impression that they would go away with time.  But its been six months of sexual activity and they are still as strong as they were in the beginning..to the point where I feel absolutely disgusted with myself afterwards.  How unfair would it be for me to tell my boyfriend that I no longer want to engage in sex anymore?  Part of me feels like this is a selfish request, considering we are only 8 months into the relationship with no talk of marriage yet, but I don't know what else to do.
<bot>: I (28/f) have been struggling with intense guilt for engaging in sex before marriage and want to tell my boyfriend (31/m) that I can't continue having sex with him anymore.