How do you know you are in love???!!
what you do if you think you are in love is you marry the person. struggle through lean times, work to build a life, have a bunch of kids, watch them grow and go off on their own. this should take about 25-30 years.
then take a good look at the other person. if looking at them doesnt make you want to puke or run off to a distant island, then you are in love. normal?