Not a Virgin but he thinks I am?

So I started dating this really amazing guy but he thinks I'm really innocent and stuff but I'm not sure if he thinks I'm a virgin or not. I'm in a pickle wether to tell him I am or if I'm not(if he asks).  I lost my V a yr ago and I haven't done it ever since, but I'm scared to tell him. He's the sweetest guy I kno but I can't help but be scared he won't like me cuz of that. God I think I'm in love him, I'm scared to loose him. (I'm 19 and he's 25)