Hi
anon2358 and welcome.
All of us here have experienced the push/pull dynamics of these types of relationships and I want you to know that you are not alone, we get it.
The rollercoaster of emotions can leave us drained and lacking in self care. Are you making sure you look after yourself? Do you have a strong support network, friends, family?
She says that sometimes I can act in a way that can be pushy, inconsiderate, and manipulative(harsh). And that confuses her because she can't tell if I actually am those things.
It is harsh, especially when we have their best interests at heart. It's difficult when being called these things because we can often start to think that their perceptions are correct. It's important that you honour your own gut feelings here.
I still don't know what triggered her or if it even had anything to do with me
Probably fear of abandonment/engulfment. You split up, she fears abandonment. You get back together, she fears engulfment. It has very little to do with you so please, try not to take it personally.
What do I do to stop this from happening again or happening on this level.
You can only control yourself. The tools and workshops here can help you alter your approach and reactions, these can be invaluable.
LT.