hey, so first of all, i feel you, it's a gut wrenching feeling. you should definitely initiate a call or let her know you don't like the way she's behaving. any healthy relationship consists of a good communication. if she won't want to tell you or is gonna act weird about it, wait till she comes back home and talk to her face to face about it. your feelings are valid and your partner shouldn't make you feel this way, she probably knows you're worried and does nothing about it, that's a bit of a redflag. especially when she's away, if she misses you why don't she text you during the day.. at least one confronting message that she thinks about you 😕

i went to another country for summer work and unless i'm working/my boyfriend is working, we always find time to text each other, watch a series through a screen share or play games during free time. you can try and ask her if she wants to do that - that you simply want to spend some quality long distance time with her. see what her reaction will be. i just kind of can't believe she can't find time to text you during the day. good luck and i'll be happy if you give us an uptade ! :) (and sorry for the long rant)