Well there is always something you can do about it, but you simply choose not to.
Like what?
1. Stab the guys who shagged your crush.
2. Commit suicide in front of your crush and her BF and say ''I will never let you be together''. That horrific sight will surely forever ruin their relationship.
3. Don't be a retard and start making a move on your crush.
4. Help develop the Nervegear so you can get that dream world.
5. Figure out how to start Infinite Tsukuyomi.
There are so many things that I can't even mention them all.