Having a Hard Time Coping with How I Treated My Girlfriend

Idk how to start this, but ive been with my girlfriend for almost a year now and for a long time during this, there were moments where she would open up about certain things that were really hard for her, or even shut down when she would be having a hard time and after talking today w her, she helped me realize just how poorly i handled those moments. An example i can give is simply being insecure when things would go quiet. She said that she feels like shes on eggshells around me and cant be herself with these reactions i have. One time we hung out w her friends and i hyper analyzed whether or not she enjoyed being w them more as of recently because it felt that way to me and i spiraled wondering if it was true. It ended up being true but its reasonable given that she was suppressing herself w me out of fear of a bad reaction or just overall triggering my insecurities. Idk if i have ocd but its worth noting that i have been showing alot of signs of it and i think its been having a hand in this relationship, this example being one of those times where it has. I just realize that I have alot of insecurities and all and its really hurt her over a good period of time. Things are uncertain rn as she doesnt know if she wants to continue w me, but im having a hard time w the guilt and emotions overall and want to learn how to handle this. Its the first real relationship ive ever been in and i love her with all my heart. Ive been very controlling towards her and i want to improve