Keep in mind that it might just be your own perception that you have been thrown away like garbage, it's hard to tell what their reasons were for acting the way they did. I'm aware that this is a bit risky to say but in general people like to help without getting too involved, without it using up too much effort. And maybe it was just your own perception that these friends were so great, I'd say that humans feel these things much more when they have a hard time in life. Maybe don't take my reply too seriously at all, considering you didn't even say that much, it just picked my interest since I can relate to it.

I felt pushed away by people as well, that's why I have a negative outlook on it all, I came to think that "they" never truly cared, asking myself if I actually cared, or if it was just the slight support I thought that was there that made me feel it was something important.
I think it's important to distinguish actual care and the basic human needs to want and offer help when we feel bad, communication,... or maybe I'm overthinking this a bit too much, I'm not sure, so I'll stop this train of thought right here and hope I didn't offend you.

If it weren't for this, I'd ask you directly if you wanted to try getting to know each other a bit, but I suppose if you need nice and comforting words, I won't be able to deliver, even if I ended up feeling something. I guess I'll still just throw it out here just in case...

One last thing, contrary to what most people say, I think it's unnatural and unhealthy to try and think positively about the positive time you spent with someone. We instinctively feel bad about loosing those good times because we shift from having a good time to...well, not having them anymore, its gone, learn from it. From what I can say, people who choose to claim they focus on the positive time they had instead, have a harder time to accept it because they just avoid it, I think I'd rather feel sad about something for a good while than to avoid it and allow it to silently cause even more pain for an even longer time...It doesn't matter if you just think about it in bed or talk to others about it or whatever, but if you just try to forget about something without dealing with it, it will always haunt you, I really don't like how normal it is to encourage that behaviour...although that was probably a bit off-topic now