There are millions of undiagnosed people in the world, many of them with much worse mental illness issues than you. They don't tell perspective partners anything. There are a couple of issues I have with making any announcement.

There are many ways to communicate to him who you are. One of the best is to be yourself. One of the worst ways to describe yourself is using an emotionally charged, often misunderstood word like bipolar - especially because being bipolar isn't who you are; we're not our diagnosis!

On top of that, saying you're bipolar is a bit like saying that you're religious. Some religious people go to church once in a while. Some religious people fly into buildings or blow up abortion clinics. How can you quantify 'how' bipolar?

Incidentally, my wife was diagnosed as bipolar a couple of years ago - she's in her forties. Should I get a refund?

Lastly, maybe you are bipolar, maybe you're not. I know a lot of folks who have been diagnosed with one thing only to have another doctor reject the diagnosis and give them a different one. And then again. And again. I'd sure hate for you to misrepresent yourself...

My opinion is to just be yourself. He'll see the person you are and make his decision as to how interested he is from that. You know, the way people did it fifty years ago.