This problem has so many variables that it is impossible to weigh all the cons against the pros. That is what makes it so hard. However, even if you'd exactly know what the consequences would be for each choice, you'd still not be able to choose. Choosing is losing. But remember that not choosing is also a choice and it is most likely the worst choice.

This goes further into the concept of Ying and Yang. There is no white without black but there is also no happiness without sadness. You'll always have sad moments in your life, you need them cause without them, you can't have happy moments.

So take a choice and accept it. Stop thinking about the potentials of all the other choices you could have made cause their pointless thoughts ruining your life.