Female (20) with a low sex drive in a good relationship with Male (20)

I love my boyfriend but my sex drive seems non existent; I'm in a good relationship as we really get along and I'm still highly attracted to him but this aspect is causing a big problem. I just don't seem to want sex anymore when it never used to be a problem. I've been with him for over a year now but this has been happening for the last 2 months. In the past I've had sexual abuse happen to me when I was a child which was 7 years ago and I don't know if some psychological factors are involved.

Any advice would be great guys, thanks.