Pressure

So my boyfriend and I have been together for about 6 months now, but we also dated last year and any time we spend time together he always tries to make me cum by fingering me because I have never cum before and he wants me to feel in because in his words "It feels like nothing else in the world" but when I was younger I was mollested and I don't know if that is why I won't or don't cum. And also lately it has started to hurt more.