I'm going to set a trap for my now ex-gf
That feels very vengeful. Why will you trap your ex gf?
Because she broke up with me for some stupid reasons
I am not sure what kind of trap that you are trying to set, but I do not think that it is a good idea. You should not try to set your exes up. It is not okay.
Nah, I will set it up anyway.
She may get hurt emotionally and physically with what you are planning on doing so I do suggest that you don't go with your plan. If you are still wanting to get back together, it should be a mutual agreement between you to, not by setting up a trap with her as that would surely make her feel less inclined to get back together.