I think my boyfriend is bipolar, help?

I have come to figure that my boyfriend is bipolar. Many incidences have occured in which his mood swings and becomes (i dont know the word to use) insanely mad. One time him and I had gone to the movies, as we came out i said i had to go to the bathroom and he did to. I came out of the bathroom before he did so I was waiting for him, as he came out of the bathroom i was smiling because i was looking at him. But as i was walking towards him these two tall guys with italian jerseys cut me off so i get stuck behind them. Once i get to him he says to me, who are those guys? You didn't even go to the bathroom, u jus said that to talk to those guys. Meanwhile i didnt even know those guys. So I had to explain in detail what I did in the bathroom to get him to stop acting this way. Another time we went to my friends birthday dinner he had to leave early though because he had to go to work. He asked me what i was doing after and said i was going with my friend to my other friends house where we would be playing sherades. My other friend had even invited him to come, but he had work. So later that evening at my friends place he txt messeges me asking how's hanging out with jen, my one friend that i said would drive me to my other friends place. I responded having a blast we are all at laurens playing sherades. Then he goes off and thinks Im at a party and accuses me of lying and tells me to **** off many times to go find some Itailian guy, because he is Greek. I started breaking down in tears in front of all my friends, i had to go home and i had a panic attack. Once he was done work he came over to my place and we both cried together, but worked things out. I know this sounds a lot like jealousy but it seems like more. And now I've had enough, yesterday we went to wonderland with his brother and his brothers friends, at the end of the day he wanted me to come to a cleaning job(his father owns a cleanning company), but i said i was far to tired and sick from the sun. When i get home he starts texting me saying that im lazy and telling me to **** off again but this time i give it right back to him. Sorry i've worked 12 days in a row and then on my first day off i go to wonderland and am very tired after that and don't feel like working 2hrs cleaning till 4am. I really do not know what to do, I cannot break up with him I love him to much. I am being verbally abused and will not tolerate this. We have talked about him being bipolar before, and there is someone bipolar in their family. The only thing is I do not know how to go about him getting diagnosed with the disorder, as well as who to go to and the steps to take. His parents are no help he told me that they would just blow it off and say no he your not, please help?