This is an assumption that many make when they have met their Flame. That there is only one, because they cannot imagine feeling this way about anyone else. And while I completely understand this, I believe that we do have more than one Twin Flame, in fact, we may have several.
There is a brilliant channelled piece that someone sent me a long while back, which explains the differences between Twin Souls and Twin Flames, and was my first introduction to the Twin Rays, which I think is what people are thinking of when they believe there to only be one Flame for them. I recommend reading this piece, and also watching my video below on having more than one Twin Flame, and see if it resonates with you.
There is so much information and advice on Twin Flames now online, and so much of it is conflicting, and does not resonate, so my advice to you is – only take on-board that which really rings true, and that which lifts and inspires you. If it depresses you and makes you feel bad in any way, just release it. Perhaps later on it will resonate, and perhaps not. Your Twin Flame experience is uniquely yours, and no one can understand it but you and your Flame, so please trust your own intuition and your own inner guidance.
If you would like some ideas on how to create a balanced Twin Flame relationship, please do check out the Twin Flame class in my Academy here.