<human>: Can you provide a brief overview of the text?

Unfamiliar situation wrapped inside of an unusual circumstance; please bear with me!

A girl I've known for five years - my best friend and mutual crush of the past two years - just returned from a summer abroad.  Before she left, I found out that my feelings for her had been mutual and pretty strong for the past two years, but we only had three weeks before we left our hometown for our respective summer adventures (her overseas, me traveling the US).  She rarely had wifi but had on-ship access to email, so we were able to keep in solid contact during the summer.

When she returned to the US for her next year of college, her messages really changed - few emoji (she used to use quite a bit), rare and terse "good morning/night" texts without smileys (used to get them often and happy), no snapchats (pretty big part of her communication arsenal), and a higher tendency to no respond to texts (no, I'm not bombarding her; one or two attempts at starting a convo/day, tops).  Face-to-face Skype seems perfectly normal though, which is why everything else is kinda confusing.

**Any insight into what may be happening/have happened** on her end from you would be hugely appreciated by this 21 y/o guy.  I tried asking her it indirectly ("you seem really tired/subdued lately; everything going well?", etc.), but she blows it off and says to just stop analyzing her smileys.  Not really a huge deal in itself, but if something's going on, I''d rather not be blindsided if I can help or it involves me.  Mostly, I'm figured that communication/conversation would improve once she got back to the US, whereas it seems to have moved in the opposite direction, and that's kind of confusing.  I really don't want to lose her as a friend or anything more.

Anyways, thanks to everyone for reading through and any advice/thoughts that might come from it!
<bot>: Long-time mutual crush's communication mannerisms changed suddenly to be less warm; not sure what it means (if anything).