I was recently diagnosed with bipolar 2 after being misdiagnosed for the last seven years. It is new to me and I have been told I rapid-cycle, I am on edge often, and when I am not on edge I am depressed. I am untreated for it as of now (weaning off old medications, trying to find the right medications for me), but I will be on medication soon. I have a boyfriend of a year and a half, and he tells me a lot of the time I am "mean" and "angry," which I can understand at times, and I try hard not to be, but as we all know, it is difficult to control my emotions. I am just now figuring out why I am the way I am and learning how to cope with it -- I was not always this way, the anger has become a lot worse in the last few years. I was told because of the medications I was on, it makes the hypomania a whole lot worse, becoming worse after every episode. I don't want to make excuses, but I am trying. To cope, to learn, to control, but it seems impossible to a degree. 
My concern is I don't know if I have a supportive partner. I'm worried he makes me spiral down often, antagonizing me at times or saying things that trigger past trauma (I have a lot of it) or even gaslighting me when he says hurtful things only to say later he didn't say them at all(?). I know these are red flags, but I don't know if it's me or if it's him or if it's both. I express how sorry I am when I make mistakes/get too upset, I try to make it up to him, I try to control my emotions as best as I can. But he often labels me as only "angry" or "on edge" and says that this will be how I am forever. I think it's an unfair assumption, I am just now learning how to cope and control my emotions. I am also not "always" this way. I am generally a bubbly person, but as of the last few weeks, due to weaning off of antidepressants and the change in hormones (I have other conditions), I have been more on edge. He calls me names and basically tells me this is who I am and will always be. But I am tying so hard not to always be this person. I just need time to adjust and learn but he seems to not understand that (he has no mental illnesses). 
What do I do?
I keep trying to speak to him but I feel so unheard and alone. I'm trying to figure myself out and I hate myself for how I am and wish I could change it, but I can't and I am trying. I just want him to be supportive instead of telling me I'll never get better. 
What can I say to make him understand?
Thank you for reading, I am very lost in my head