We got along really well all summer now things have suddenly got weird?

had meet this girl at our local watering hole , she had been a hostess originally but this summer she was a server. she started that around May and whenever i was there and she serving me , we'd talk and got along really well.

we had this connection which was hard to describe , almost like she was my sister , we just got along that well and seemed really comfortable around each other.

so saw her there all through may , June , July and into August. but last couple visits things haven't gone as well and not entirely sure why. i didn't see as much of her there during August for some reason she seemed to always be working times i didn't go in.

she's only there till end of August , so Friday / Saturday could be her last shifts until she goes off to other things ( school) she won't be working there in fall or winter

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i'm not exactly sure what happened to change things , i only saw her at that place , once last summer i saw her at this other bar but she never came out there this summer. i didn't send her any texts or private message's. but though some of the other girls there might of been annoyed i was so focused on talking to her all the time
We got along really well all summer now things have suddenly got weird?
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