Even if we are soulmates, am I too old for her?

If you both feel you are soul mates, then I think you should be together. Life is to short to not be happy. You don't know what is going to happen an hour from now much less years from now. It's not easy to think about, but either of you could be gone in the blink of an eye. Car accidents, natural disasters, illness, no one can predict these things. Be together, be happy and enjoy the time you have. Live each day with joy, and good luck to you!