Sadly, we don't have control of others or their actions. We do have control over ourselves (to some extent). I have experienced similar frustration, as I think many people have in some form. To be put down and rejected sucks!

The way I survive is by trying to relate with others, even on the simplest level..around feelings. I also look at my part in situations. I have to admit I can be judgmental or make assumptions about the behavior of others. A great story, and so common in daily life..
"I shared something extremely important with a close friend, however, their reaction was disengaged, and I felt hurt, thinking, "they don't care, why bother" or "I don't deserve this".. Later I have come to find that they were experiencing something in their life where they couldn't be available as I wish they could."

Basic expectations seem given, however, people fall short; we fall short. I try to ask for what I need, or better yet, ask for clarification about someone's behavior toward me, rather than assuming the meaning of it. Like, "why do you feel this way? Please help me understand. What is your perception; where do I not see?"
It is hard to hear painful feedback, but I swear if I just listen (get upset later) and try to objectively analyze what they are saying..often there is some truth to it. Accepting feedback is the best way to change. (In my opinion)

Sometimes, too, there are jerks who are rude and say harsh things. I feel we can all learn things from these people, however, I try to stay away from someone who puts mean labels onto me. Constructive feedback (although painful to take it) vs Emotional outbursts.

I hope you experience more clarification around this. I, and many others, are here to support you.