Sex reality vs. expectation??

Am I the only one who has been unimpressed with the feeling of sex in comparison to expectations? Don't get me wrong, it feels really good, but I grew up thinking that sex was something super special and that when you share it with someone you love your bond will grow because sex releases all of these hormones that cause you to feel closer and more attached to that person. My boyfriend and I just recently had sex together and I don't know if there's something wrong with me? I've had sex once before (and he's done it before as well) but I wasn't in love and knew that at the time so I figured that was why I didn't feel any additional attachment, but I expected it to be completely different now and it really wasn't.