Question: how do you know you are in love and meant to be with that one person? 

Answer: Firstly, you dump the concept of love and omit it from your vocabulary.  Then ah-ha, you can begin to figure some basic things out.  Stuff like how well do you communicate true and honest stuff.  Do you agree to disagree?  Can any and all topics be on the table without one or the other saying something lame like, "I don't wanna talk about that."  Does one or the other think they irreversibly have the plan for the other.  How much is seeped in a follies-filled belief' system.  Is it but the sex that is important but yet you distort?  Boil out all the fecal matter and it is the quality of your communication which will give you your answer.
This question from the Yahoo Q&A forum is categorized in the topic: Education & Reference