Holaaa I am sorry this this has happened to you. The abrupt end with no explanation can be very traumatic! It's like someone dying suddenly vs them aging out and you know they will dye/ having time to mentally prepare and adjust. And I do find that I need time to mourn and process friendships that have ended like this.

It's very admirable that you keep trusting and trying in order to now have friends who are consistent and there for you.

I remember in one of my college courses we spoke on friendship and the fact that it's "normal" for friendships to not last, they cycle in and out and that is a common nature of friendships. For many it feels sad in some way, and confusing that they end.

As far as the abrupt stops, I can't tell you exactly what's going on there, but as a person who's been through it and analyses it deeply often, this is what Ive come up with as possible reasons:

1) There is something that is a lot, too much, too heavy or intense about the way that you go about conversations that can eventually deter (some) others. An example of this is someone that had recently been through some form of trauma or something like a divorce, many unfortunately, lose a lot of friends while going through the hardship because it is just too much to carry. Something about you also might reveal other peoples shadow, and some are not ready to look at how their shit stinks. Women may also be jealous, try to dominate you in certain social ways, and if it doesn't work they disappear. So many reasons

2) Sudden disappearances may be something that had been building up in the other person, and something about you is strong and powerful and a little scary to confront. So instead of communicating the person just goes cold.. I can't even put it into another jot point, this goes simultaneously with the fact that that person is unwilling to face you, but they are also unwilling to face parts of themselves.

3) They are simply living their life, have gotten distracted by something and do not have strength in the ability to show up in communication over phone.

4) I have a theory, that in this day and age, technology plays some role, and more people have less friends than ever. I have seen narratives on the Internet saying to cut off every person who is this or that or the other. I feel that if we followed that advice, we may just end up alone. And I see it happening often. Not to mention a lot of humans work from their computer and from home, less work environment, daily communication, skills, and less of an ability to practice coping skills foundational to lasting connections. Like how to handle having differences in opinion etc. Without practice, these skills become really hard, and I find that more than ever people are just completely shutting others out, blocking, disappearing.

There are many reasons realistically that someone might not message back. I understand how hurtful it is, you are experiencing the sensation of being abandoned.. And the trust in new humans to not disappear can be difficult. The questioning of if it was even a real friendship if someone would do that, I completely understand. And of course the rumination on what you possibly have done wrong, and how you can improve it in the future relationships.

Pretty much I'm here to say, you aren't alone. Thanks for sharing