If she still in love with you you have todo every thing to bring her back because she is making her self unhappy
But if she broke up with you because you cheated on her leave her because you will...
a runner covered a distance of 100 meters in 10 seconds and returned the same distance in 80 seconds
then the average speed comes in two ways:
1) 200/90 = 20/9
2) speed 1+speed2 /2
=10+1.25 /2...