I hope nothing I say here sounds callous, but I think more people are in a similar position than you think.

I never left my country, but I had a similar experience switching schools every year.

From all the friends I had made, I really only talk to 2 of them seldomly. One tends to only message when it's convenient for them or if they need advice/something from me.

The best advice I've seen here that I'd recommend prioritizing is not jumping into another relationship until your mental state is back intact and to get involved in your community or hobbies to get out there. Most of your better quality friends will come from finding people who are like-minded in your current stage of life. It's common for some to be stuck dragging deadbeat friends from high school into adulthood with them. So, in a way, you have a fresh start from experiencing something like that.

I wish you the best in finding yourself. You're so young, and you'll experience so much growth and change in just the next few years alone.

You got this! 💪😎👍 (AND HAPPY F***IN' BIRTHDAY!!!)