So you've seen this cute girl on your morning commute every day, and you're now sitting together and generally enjoying each other's company.
Now you notice that she changed her hairstyle, probably as a result of comment you made the day before, and she blushes when you compliment her looks.
Is she into you?
a. Yes
b. No
c. Can't Tell
The appropriate answer here is (c)
She most likely changed her hairstyle to imitate the video game character she's a fan of, and if you're real with yourself, everyone likes getting complimented.
Your best bet is to take a different train route moving forward so you don't run into any potential embarrassing scenarios, and just pretend all of this never happened.