When do I understand that I have finally met my soul mate?

Also let me know if anyone of you can suggest me that how to know who is the one I will be happy with?

You go through life, and when you meet someone, you give it a try, and see what happen.

If things go really good, you get old together, and are happy, with many offspring.

If it doesn't go well, you leave, and try again, with someone else.

The fun is in the journey, not the destination.

We could argue all day if there is or is not really a "soul mate"
But in general any relationship wlll require a lot for weight