I keep falling for guys that are out of my league?

All the guys that i crushed on are out of my league, and so none of them like me back or knew i liked them. My first boyfriend thankfully and luckily was someone way above my league and i got him. I was so happy that he was mine, but was only mine for a short while, which is sad. I knew i couldnt keep him because hes way cool, like out of all the guys i've met, hes the best guy out there. He has fan girls, witty, charming, good sense of humor and very kind and caring person. Im sure every girl out there would probably say the same thing about their boyfriend. But i really think he was one of a kind and really rare to find. But anyways.. i think since we broke up, my standard is higher now. I probably wont fall in love easily unless i can meet someone who is way better than him, if not, i guess i can be happily single.