How should I do this?

My girlfriend and I are on a break that she asked for. But i can't help to think that it's not going to work out. I have been emotionally checked out of the relationship for a while and I just dont see a future for us anymore. Should I break it to her it's not going to work in person? I dont want to hurt her to much but I think it's best for the both of us.

How should I do this?
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