Why a girl like me shouldn't date

OKay so I have a problem.
I've been really into this guy for 2 months and it started off amazing. I mean we really hit it off from the start. The day he got my number he called and from then on we talked for like an hour or 2 every night for 2 weeks. We hung out a few times and then last week we went on an offical date which ended up with alot of kissing and becoming an offical couple.
he's been so amazing and he's fun to be around.
but then when I saw him this week it seems like things just turn a bit cool. Like The only time he even kissed me was when I dropped him back at work, and it wasn't even one of his mind blowing 'holy crap I could fall in love' ones but a peck you would give a family member or best friend.

And here's the bigger problem....I don't know if I'm really as attracted to him as I thought I was when we first met. Is there something wrong with me? I mean, we just started dating and it's almost like I feel bored. I feel terrible.
and why it is that NOW that I have a boyfriend every place I go to there's always SOME cute/funny/sweet guy that's drawn to me???
do guys have like 'unavailable' radar that makes them want to go after girls who already have guys?

There's something that I think everyone should realize about relationships.

One, if you move too fast, then you are bound to get bored sooner or later and the relationship is most likely going to end. So take it SLOW.

Second, don't always go by feelings. Just because you like this guy, it doesn't mean that you are going to be CRAZY about him 24/7. How 'highly' you feel about someone has an equal 'low'. That doesn't necessarily mean that you hate the person, but the romantic feelings aren't always going to be there just because you are in a relationship.

Give it a little bit of time. If it doesn't work, then it doesn't work. Hope I've helped :)

i know what you mean way too well... and seriously its really wierd but im almost always attracted to the girls that already have boyfriends more than girls that are single but seriously in your relationship it's still ok for things to fade in and out iv actually found it often makes for a lasting relationship