Depression Treatment Care

I have a friend who has been diagnosed with Bipolar disorder. His whole life he has been a rather introverted person. This could be an example of depression. Last month he became extroverted for the first time, and became talkative brave, and out going. He then went to the doctors and recieved a diagnoses of Bipolar 1 disorder.
Can a person be diagnosed with Bipolar 1 disorder with only 1 supposbly manic episode? He has never acted this way in any other point in his life?

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Although my moods are more stabilized now, I miss the creativity and drive that would come while I was getting to or at a manic stage. I really excelled during those stages. However the stable moods also mean that I don’t have to deal with the far more common deep depression. I want my creativity back.

my ex gf and i dated for 3 years. she broke up with me a couple times, and hooked up with a couple of guys, then came back. same thing everytime. she broke up with me abou 4 months ago because she said she wanted to be “alone”. she hasn’t been “alone” the whole time. she hooked up with someone a week after we broke up. and 2 months after we broke up got a new boyfriend. they’ve been dating for about 2 months now.
everytime we break up, after a while she comes back to me. i don’t know if that will happen this time. the last big break up we had, we still talked a couple times a week and hung out a few times over the 5 months we were broken up. this time, she never talked to me unless it was to flip out on me. but recently she had come in contact with me although she still has a boyfriend. she asked me how i was doing and stuff. i don’t know what this means.
she has been diagnosed with bipolar and does not take meds. i just want to know how do i know she is really going manic during these stages and not just being a ****? How can i be sure that she will become depressed this time and want me back? how do i know its really bipolar? it sounds a lot like it.
how can i know that there will be a depressed stage because she has been manic for about 6 months now. last time it only lasted about 4. does it do different things everytime? is a depressed stage definetly going to come?
anyone with experience with bipolar or bipolar exs please help.

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junk food visits strobe lit clubs irregular sleep patterns angry most of the time and lacks concentration Rants and blames everyone. Does not accept his bi-polarity. HOW TO REACT
PLEASE TO UNFAIR UNTRUE ACCUSATIONS tHANK YOU
What reaction is most effective ? Was stable when avoiding junk foods and stimulants. Best when exercising daily eating five fruits daily regular sleep patterns and lots of bananas and tap water plus multi vitamins plus lithium carbonate. Change happenned when he again started to drink tea with sugar Manic phase started almost immediatly and the excessive sleeping has started there are bouts of anger with lots of unfair accusations