Confession

I've been dating this guy for about 4 months I've grown very comfortable infront of him and I love having sex with him. I'm 19 and have had sex with 8 guys. But I'm not able to orgasm whenever my boyfriend and I have sex or during oral or when he fingers me, I haven't ever been able to by anyone other than myself. I want to tell him but I'm afraid it will hurt his feelings because I've been faking it this whole time. But I really want to tell him at the same time so we could try and fix it. But at the same time I worried it's just too much work to try and what if I just can't orgasm from him and just from myself? I don't want to make him feel like a failure. Is there something wrong with me?