I am almost 17 years old and recently lost my virginity. This was with my girlfriend and we spent the entire night together so naturally we did it multiple times in multiple different ways, however I never felt anything. There was no pleasure during intercourse or oral sex however when she used her hand I did end up having an orgasm. I'm certain this has something to do with having masturbated before and I had gotten myself used to a certain way of reaching an orgasm, and I'm worried that I have done some permanent damage to myself and will never be able to reach an orgasm through intercourse. I'm fairly certain it isn't the girl, and am sure that it is something to do with me. Every time I just ended up losing my erection as it felt more like an ab workout than anything else. Does anyone know the cause of this? Or much more importantly a way to remedy it? Thanks.
Other facts that may be important to know: I have masturbated many times, and have gotten to the point where I require a relatively tight grip to reach an orgasm. I am relatively skinny for my age, however I don't exercise often. I weigh around 120-130. We did use condoms, except for when we did oral (which is why I'm fairly convinced it wasn't the condom).