Flattery does not encourage the perfect flow of love in the vein of your relationship. Be genuine and speak out what you feel for each other without hiding the painful truth.
People will walk in and walk out of your life, but the one whose footstep made a long lasting impression is the one you should never allow to walk out.
It doesn't really matter if you are left behind the back, but what matters is your capacity to pull and push everyone by your way to get to the front.
There are better people in the world, do not let the worst do the worst to you, you deserve the best in life.