<human>: Could you distill the essence of the text into 1-3 sentences?

I've been friends with Tania for 2 years, and I mean really close friends. We even lived together for about 8 months and we just did everything together. She has a boyfriend who lives on the other side of the country, whom she has been able to see in the last week or so. However, she has completely gone off the grid since then. She hasn't messaged me in three weeks and I move countries in a week! Last time we messaged each other she said she wanted to catch up but I don't know now if I want to because I'm so upset that she has been ignoring me. I get that she wants to spend time with her boyfriend, but I feel like if I was her sister she would reply to my texts/message me to check in. We used to message 24/7. And I also have a boyfriend so it's not like I completely depend on her, but I really miss her as a friend. I just need advice what to do: should I text? If she texts, should I reply? Will I regret it?
<bot>: leaving the country in a week, best friend hasn't contacted me in three weeks. If she messages me should I reply albeit I'm pissed off. Or should I text her? Please help.