Don't show a friend your gift, or your bag of money if you still want to maintain your relationship, but if nay, go on, and all you'll see is hate and jealousy, and you'll fight with him in the street like a dog and all you'll feel is regret.
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.