<human>: Give me the gist of the text in a nutshell

I've had this issue since I was 16. It normally happens in arguments, but any time I'm worried about something, upset, etc, I get really, REALLY upset if I'm blocked or ignored. It gets to the point where I feel like I panic and sort of feel like I'm drowning, and the only way to feel better is to get that person to talk to me. It's a bit of a snowball feeling in the way it gets worse, and I always feel like if i can just talk to them and get a breath of fresh air, I would be fine. If the other party has a legitimate reason, like they're at work, etc, I will understand it, but it will still make me feel awful inside.

**For example, a text conversation today:""
A girl I'm in a complex relationship started her new job. We're both in a stressful situation right now so tensions are amplified. She had to cancel plans we made for after work, and I tried to be cool about it but things turned into a conversation (not an argument), which quickly got me more upset because of her inability to respond to me. 

Looking back, this seems MUCH more simple than how I felt then. When I read the chat log now I really can't tell what made me so upset. But I did get really upset. And this needy behaviour grinds on MY SOs, and is the reason this one isn't a girlfriend any more. I need to change.
<bot>: I get needy if ignored/deprioritized. Even if I understand it logically I cannot handle it emotionally. My secondary problem is I am too sensitive in general