Was the breakup my fault?

[Steven]

Lisa, it is never the fault of 1 person.
People break up because there are things missing, thinking it will be better with someone else.
At this time, try to avoid contact, certainly don't call, send messages, etc..
Leaving him alone, will make him think that you are over it.
if he calls you, don't pick up or pick up and tell him that you have things to do.
Keep it like this for at least a month, in the meantime he will start to think about the good things about you, instead of calling eachother bad names and fight.
Be smart, follow your brain instead of your heart