Orgasms

Ok so like I’m not sure I’ve ever had an orgasm. Like I have a boyfriend and we haven’t had sex yet but he does finger me and go down on me and I do masterbate. It feels good and I like to moan and things but I asl feel like I would know if I’ve had one. Like how do I know? Also my boyfriend knows when he’s about to cum and I never have any idea. What does that mean? I really would like help cause I have no clue if I’m doing something wrong or if I should keep going longer or what.