Like BethRags said, you get to decide if you want meds or not. If someone tells you that you "need" meds, then that's their opinion and you can do whatever you want with their opinion (unless you've gotten into legal trouble and you are legally required to take meds, as that's a very different situation).

I don't see the harm in being honest and open with someone if it gets you the help you need. Plus, meds aren't the only treatment available. You can do therapy and be med free if that's what you desire. There are people on this forum right now who aren't on meds and they are content. So in that respect, I don't think it would hurt to get a diagnostic opinion. In fact, a proper diagnosis can help you understand yourself better. I'm not saying that a concrete diagnosis is "necessary" to get proper treatment, because the end goal is to treat the symptoms, not the label, but understanding yourself and your brain chemistry can be a powerful coping mechanism on its own. And since you're asking us if you have bipolar, I think you're actually seeking a concrete diagnosis because you feel it's important. So, why not be open and honest so that you can be confident that you do or don't have something? (I know opinions aren't perfect, but you see what I mean.)