You're absolutely right, the ones that you're heavily into be the ones that have you messed up once shyt goes left.sadly, in this day in age, its a chick like this that you're probably better off wifing. u dont want to wife up a chick u are super into because when men love, we love hard and women know when u really like them. and if she is a unscrupulous woman (which will most likely be the case) all she'll be plotting on and thinking about is "what more can i get from this guy?".
my advice, if you are sexually attracted to this chick, and ur not easily turned off by her, id say give it more time. the ex of mine i spoke off several pages ago who flew from coast to coast to visit me, i wasn't deeply into her. but i cared about her. like i said, had she been younger or around my age, id have zero problems wifing her.
if ur looking for the one chick u're going to be super into, beware, you are heading into a rabbit hole u wont be able to get out of easily.
At the same time, I'm fearful that if the chemistry isn't there, someone else's is eventually going to grab my attention who I do feel like I have chemistry with.
I'll give it some more time like you and @The ADD said, I'll see what it is by the 3 month mark.