Love at first sight?

Love at first sight is a myth. You can't truly love someone you don't know very much about, and certainly not based on looks or superficiality.

However, in your situation, you've been dating him for months and feel very good about the relationship. This isn't what people mean by "love at first sight", so that isn't the question really. The question you REALLY have here is why do you feel so comfortable and attracted and such warm feelings toward him after only a few months (how many months you didn't say).
If it feels good and is reciprocated, then you've picked up on something special here. The only thing you have to be careful of is moving too fast or ignoring red flags that would indicate the relationship is unhealthy.

Just take it slow, spend more time with him doing different things, and see where it goes. By the way, the feelings you say you "weren't supposed to have" during a relationship are exactly the good warm feelings that you should have. Just remember about watching for red flags, and you'll be just fine.

I think they call that INFATUATION and LUST at first sight. Don't confuse that at being in love though. Big huge difference.

I'm sort of jumping in on the convo here and I may say something that was once already said, but, I wanted to say that there are sides of people that aren't revealed till they are comfortable. In every relationship I have ever been in has been similar in the aspect that they all change when they are "settled" in. Everytime I learned other sides of my boyfriends later down the road after we had been together for a while or moved in together. Some bad, some not so good, and some really appealing. I'm just saying that you can not fully know a person in a sight or in a day, not even with in a week or a month. It takes time, and in order to live somebody you have to know them.

weve both talked about it and weve both expressed concerns that that would be the case. that it would seem awesome at first til he "real" version came out. i know, personally, i have given up on hiding the crazy and pretending to be something im not just to impress someone. and he agrees and says he doesnt see the need to hide who he is anymore. he's been **** on by exes and so have i. and hes almost 26 so hes getting to the point where he just wants to settle down and he's told me that. so i dont think he's into playing games or hiding something y'know?