1) Letting go of someone that truly loves you because you feel you are not good enough for them, and knowing that they would be happier with someone else?

-OR-

2) Keeping someone who truly loves you because you are being selfish and don't want to lose an amazing person to someone else?

i would say two is worse because that wouldn't be fair if you were selfish. i say ones a good thing or a proving thing because you only want the best for someone who you Truly love :)