Peace confusedteen,
Once you have premarital sex, the trust between you and your boyfriend will be broken in that area of your relationship.
If you and your boyfriend are spending too much time together alone, then maybe you should be less alone together and more involve with other group activities or ministries.
Although I am a man, when I lost my virginity, I was overjoyed for a day but then I became depressed and confused thereafter. I could no longer trust my girlfriend because I could not trust myself and our relationship. We later broke up. By that time, I only thought that sex will comfort me but instead, it left a deeper hole in my heart. After about a dozen or so unfulling relationships, I finally gave up and did what God wanted me to do...to trust in Him.
And it has paid off...abundantly!!
BIC,
Eddie