Fall in love with as many people as you like.
But if you're going to form a lifelong relationship with them, you may want to add a little thought.
Be sure you and your mate agree at a conscious level that the purpose of your relationship is to create an opportunity, not an obligation---
an opportunity for growth, for full self-expression, for lifting your lives to their highest potential, for healing every false thought or small idea you ever had about you, and for ultimate reunion with God through the communion of your two souls---
if you take that vow instead of the vows you've been taking---the relationship has begun on a very good note.
Still it's no guarantee of success. If you want guarantees in life, then you don't want life. You want rehearsals for a script that's already been written.
Life by its very nature cannot have guarantees, or it's whole purpose is thwarted.