I don't want to say I understand this word for word, but I understand where you're coming from in a way. I get that way with friends I depend on and require them to text me back immediately or I'll start assuming they hate me even after like a... Two minute wait? Then commences the freak outs, the panic attacks, the sobbing...

And of course, they don't mean to ignore me because they have class or work but I always assume the worst and get very paranoid.

I'm sorry you're experiencing so much pain from this. I hope you're boyfriend is supportive and understanding.