Advise please!!

I will try to make this as short as possible....my boyfriend and I have been together almost 2 years and have a baby together. Amost a year ago he started having seizures and was put on medication. (I was told by his doctor that the medication could cause him to become bipolar, and if i noticed the signs i need to call her) I have been there the whole time. Well about a month ago everything changed. He started acting different. He has random burst of emotions from mad to sad to happy all in one. I know these are the signs of bipolar and i have talked to him about it and he asked me not to tell his doctor because if he can be on this medication for 2 more month seizure free they will stop the medication. Welllll......i dont know if I can take the bipolarness anymore. He talks to me like I'm freaking stupid, he will dumb shit down like i dont know what he is talking about ( this triggers stuff from my past that my ex use to do, so my feelings get hurt) when i tried to explain that to him yesterday he got mad and wouldnt talk to me and then when he did talk to me he said he was mad because I had an attitude..

i didnt, my freaking feelings were hurt!! Well today he hasnt spoken to me all day and then just got up and left so i decided to text him to express my feelings...

His only response was "its always something" anytime I express my feelings it always starts a fight or he will turn it on me somehow....i really dont know what to do anymore. I love this man more than ive ever loved anyone else but I'm tired of being put down....so my question is do I stay and deal with it until his is back to normal (after he gets taken off the medication) or do I break my own heart and leave???