The Reddit community "Am I The A**hole?" exists to help people cope with some of life's more difficult moral quandaries. But sometimes people present an ethical "dilemma" that turns out to be pretty obvious to everyone but them. This is one of those times.
As the man explains in his post, he considered his grandma like his "real 'mother'" since his actual mother is a drug addict who he "never cared for." He writes:
This actually happened about 5 months ago, but since my girlfriend (no longer engaged) refuses to let it go, and I honestly don’t think I’m in the wrong, I figured I’d ask for an outside opinion.
My girlfriend (then fiancée) were engaged to be married about 5 months ago.
Now, my biological mother is a useless drug addict that I’ve never cared for nor wished to pursue a relationship with. She left me with my grandma and I was raised by her since birth. I have always and will always consider my grandma my real “mother” because she raised me and cared for me all my life.