Falling in love with someone who is bipolar will never be easy.
There will be minutes, hours, days, weeks, or even months where I'm unexplainably mean, or recklessly happy.  
For a period of time, I may be all over you and want to smother you in my aforementioned reckless happiness, that I will forget to ask how you're doing and if you ate anything today. I will forget that unlike me, you need to sleep for 9 hours a day and that you're not fully ready to take on the world.
At some point, I will take a turn for the worst and will mope in unbelievable sorrow due to the death of my false happiness.
I will cry about everything and will stop calling, and forget to remind you that I love you so much and just need some time away.
My deep sadness will soon turn into unrelenting anger and I will tell you abusive things that I don't really mean.
I will be confused as to why I say them, and apologize a million times and try to explain that I can't control my anger, and that I need to leave and be away from people for a while, although I know nothing will really help.
You will insist that it's okay and tell me you love me.
For days, weeks, or months, I will do this, and you will soon think I am lying and think that I am just genuinely terrible.
My constant apologies will become nothing and you will soon distance yourself and start falling out of love, but still have a glimmer of hope.
After this episode, I will have a period where I feel nothing and am almost robot-like. You will feel unwanted and unloved and look at me with such sad eyes and get nothing but a shrug and a half-assed "sorry."
When you finally walk away,  I will have more bad days than good days because I will regret not saying I love you more.
I will hate myself for being bipolar. I will fall back into my bad habits and soon you will be a distant memory.