<human>: I cheated a few weeks ago with a random woman. I've been planning on the breakup for a while now but I finally went through with it. She was a good girlfriend but she wasn't the person I wanted to marry and she didn't understand that and I didn't really have any good reasons as to why except "it's not what I want". We can still talk but I want to make it easier for her to move on. I feel awful about it and I don't have any good excuses. I've never cheated before but this is also my longest relationship that I admittedly stuck out with for probably too long.

Should I tell her that I cheated? Would that help? Mostly I broke up with her because of how good she was and how bad I was, I really knew it wasn't fair.

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<bot>: Broke up with gf of 1.5 years and cheated but didn't tell her. What are the next steps? Help me understand how I should look at all this.