All the prior answers come from women like you. I'm a guy, and I'm definitely an "at first sight" believer. However, unlike the guy you're with, even though I knew within an hour (two times) this person was for me, I did not, either time, try to snow them or push them or go too fast. The first time I was 15, when you really can't get married. The second time I was 23, when you can get married, as we did and as we've stayed, for 42 years.
And I can easily believe that men go faster than women. It makes evolutionary sense. Women's investment in a relationship is a lot more important than men's. Of course, that had nothing to do with what I did or did not do. To be presented with someone you really, really love, all of a sudden, is kind of like seeing the Grand Canyon for the first time. Or skydiving for the first time. To me, at least, it made me hold my breath and not want to go all that fast. So though I progressed "with all deliberate speed," (as the Supreme Court has said), it was a gradual process, though I knew from Moment 1. I was really being tender about her feelings.
But if your guy is telling you that you are IT, it's entirely possible that he's telling you the truth. At the same time, you have every right in the world to tell him to slow down. If he really loves you he'll take your cue and only do what you're comfortable with. If he's pushing you beyond your limits then I would wonder about whether he really does love and care for you.
Take care!
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We must love one another or die.
W.H. Auden
We must love one another AND die.
Ygrec23