The accomplishments of others in no way limits your ability to be accomplished.
Your friend my have gotten an A on that exam while you got a C, but her A didn't stop you from also getting an A. There is no limit to what you can achieve if you take the appropriate steps to be rewarded with success. There is no pool of success that will run dry if others drink from it before you get a sip.
This is why you should be happy for your friend for their accomplishment - truly happy and joyous for them, not jealous. If you are the one with an A and your friend the C, be prepared to encourage and offer assistance. For allowing that friend to flourish does not take from you either, it only adds.
For nothing will be impossible with God. -Luke 1:37
