<human>: Have any of you ever had second thoughts about a girl/guy, after dating for about a 3weeks?

At little detail: she once told me that usually she only dates bigger guys(4yrs older, and a bigger body) and that he should not be shy about anything.

About this, I was an exception because I am shy about certain things but confident enough, same age, and a bit smaller body.(to this she said, its more fun than she thought it would be)

Would I be correct to assume that maybe she had second thoughts about me, that I'm not what she wants?

Her reason was that she's not ready for a relation ship, since she just broke up from a 4 yr old relationship. At first she also stated that she doesn't want a relation, but was first to say that she misses me when im not around, and that its very good that we are feeling the same thing.

I can almost definitely say that we had fun in those few weeks, so that shouldn't be an issue, chemistry was there and we did get physical, so there was attraction(at least I assume so)

Can you condense the text into three sentences or less?
<bot>: Would you ever leave someone after dating for a few weeks, simply because you had second thoughts about them or because you didn't see him attractive anymore? Has that ever happened?