I love her and I don't want to let her go before it's too late.

I have been together with her for a long period of time, once I officially been together with her I thought I could be relaxed and not do anyt . And I had hurt her alot, as I had done something so stupidly to the point that now she hates me for everything I do, she thinks I don't know what she love and don't like and it's makes me feel so hard for me to realise after I hurted her alot to do something. Once I start to put the effort in, she decided to expect alot of things from me, she gets angry at me almost at everything. Today she told me she hates my existence with her and that's the reason why she gets angry at me. I had never felt so broken in my life. I do not want to leave her, I have tried everyt , got her flowers , tries to be very respectful towards her knowing she can be very short tempered and would say words quite harshly. I'm just unsure of how I can improve to become better. When we fight I do not know how to initiate the first step, and it's hard for me to think of what she's thinking because she don't tell me what's happening. There's time where she would get mad at me for something that I don't know why is she angry for. I really really love her. I do wish to spend the roml with her. But right now at how's things are going it's not going anywhere there.